Drop use of this long-deprecated option for powerpc.
Signed-off-by: Simon Glass <sjg@chromium.org>
obj-y += traps.o
obj-y += cpu_init.o
obj-y += fixed_sdram.o
-obj-y += i2c.o
obj-y += interrupts.o
obj-y += iopin.o
obj-y += serial.o
+++ /dev/null
-/*
- * (C) Copyright 2003 - 2009
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * SPDX-License-Identifier: GPL-2.0+
- *
- * Based on the MPC5xxx code.
- */
-
-#include <common.h>
-#include <asm/io.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#ifdef CONFIG_HARD_I2C
-
-#include <i2c.h>
-
-/* by default set I2C bus 0 active */
-static unsigned int bus_num __attribute__ ((section (".data"))) = 0;
-
-#define I2C_TIMEOUT 100
-#define I2C_RETRIES 3
-
-struct mpc512x_i2c_tap {
- int scl2tap;
- int tap2tap;
-};
-
-static int mpc_reg_in(volatile u32 *reg);
-static void mpc_reg_out(volatile u32 *reg, int val, int mask);
-static int wait_for_bb(void);
-static int wait_for_pin(int *status);
-static int do_address(uchar chip, char rdwr_flag);
-static int send_bytes(uchar chip, char *buf, int len);
-static int receive_bytes(uchar chip, char *buf, int len);
-static int mpc_get_fdr(int);
-
-static int mpc_reg_in (volatile u32 *reg)
-{
- int ret = in_be32(reg) >> 24;
-
- return ret;
-}
-
-static void mpc_reg_out (volatile u32 *reg, int val, int mask)
-{
- if (!mask) {
- out_be32(reg, val << 24);
- } else {
- clrsetbits_be32(reg, mask << 24, (val & mask) << 24);
- }
-}
-
-static int wait_for_bb (void)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c512x_dev_t *regs = &im->i2c.dev[bus_num];
- int timeout = I2C_TIMEOUT;
- int status;
-
- status = mpc_reg_in (®s->msr);
-
- while (timeout-- && (status & I2C_BB)) {
- mpc_reg_out (®s->mcr, I2C_STA, I2C_STA);
- (void)mpc_reg_in(®s->mdr);
- mpc_reg_out (®s->mcr, 0, I2C_STA);
- mpc_reg_out (®s->mcr, 0, 0);
- mpc_reg_out (®s->mcr, I2C_EN, 0);
-
- udelay (1000);
- status = mpc_reg_in (®s->msr);
- }
-
- return (status & I2C_BB);
-}
-
-static int wait_for_pin (int *status)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c512x_dev_t *regs = &im->i2c.dev[bus_num];
- int timeout = I2C_TIMEOUT;
-
- *status = mpc_reg_in (®s->msr);
-
- while (timeout-- && !(*status & I2C_IF)) {
- udelay (1000);
- *status = mpc_reg_in (®s->msr);
- }
-
- if (!(*status & I2C_IF)) {
- return -1;
- }
-
- mpc_reg_out (®s->msr, 0, I2C_IF);
-
- return 0;
-}
-
-static int do_address (uchar chip, char rdwr_flag)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c512x_dev_t *regs = &im->i2c.dev[bus_num];
- int status;
-
- chip <<= 1;
-
- if (rdwr_flag) {
- chip |= 1;
- }
-
- mpc_reg_out (®s->mcr, I2C_TX, I2C_TX);
- mpc_reg_out (®s->mdr, chip, 0);
-
- if (wait_for_pin (&status)) {
- return -2;
- }
-
- if (status & I2C_RXAK) {
- return -3;
- }
-
- return 0;
-}
-
-static int send_bytes (uchar chip, char *buf, int len)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c512x_dev_t *regs = &im->i2c.dev[bus_num];
- int wrcount;
- int status;
-
- for (wrcount = 0; wrcount < len; ++wrcount) {
-
- mpc_reg_out (®s->mdr, buf[wrcount], 0);
-
- if (wait_for_pin (&status)) {
- break;
- }
-
- if (status & I2C_RXAK) {
- break;
- }
-
- }
-
- return !(wrcount == len);
-}
-
-static int receive_bytes (uchar chip, char *buf, int len)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c512x_dev_t *regs = &im->i2c.dev[bus_num];
- int dummy = 1;
- int rdcount = 0;
- int status;
- int i;
-
- mpc_reg_out (®s->mcr, 0, I2C_TX);
-
- for (i = 0; i < len; ++i) {
- buf[rdcount] = mpc_reg_in (®s->mdr);
-
- if (dummy) {
- dummy = 0;
- } else {
- rdcount++;
- }
-
- if (wait_for_pin (&status)) {
- return -4;
- }
- }
-
- mpc_reg_out (®s->mcr, I2C_TXAK, I2C_TXAK);
- buf[rdcount++] = mpc_reg_in (®s->mdr);
-
- if (wait_for_pin (&status)) {
- return -5;
- }
-
- mpc_reg_out (®s->mcr, 0, I2C_TXAK);
-
- return 0;
-}
-
-/**************** I2C API ****************/
-
-void i2c_init (int speed, int saddr)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- int i;
-
- for (i = 0; i < I2C_BUS_CNT; i++){
- volatile i2c512x_dev_t *regs = &im->i2c.dev[i];
-
- mpc_reg_out (®s->mcr, 0, 0);
-
- /* Set clock */
- mpc_reg_out (®s->mfdr, mpc_get_fdr (speed), 0);
- mpc_reg_out (®s->madr, saddr << 1, 0);
-
- /* Enable module */
- mpc_reg_out (®s->mcr, I2C_EN, I2C_INIT_MASK);
- mpc_reg_out (®s->msr, 0, I2C_IF);
- }
-
- /* Disable interrupts */
- out_be32(&im->i2c.icr, 0);
-
- /* Turn off filters */
- out_be32(&im->i2c.mifr, 0);
-}
-
-static int mpc_get_fdr (int speed)
-{
- static int fdr = -1;
-
- if (fdr == -1) {
- ulong best_speed = 0;
- ulong divider;
- ulong ips, scl;
- ulong bestmatch = 0xffffffffUL;
- int best_i = 0, best_j = 0, i, j;
- int SCL_Tap[] = { 9, 10, 12, 15, 5, 6, 7, 8};
- struct mpc512x_i2c_tap scltap[] = {
- {4, 1},
- {4, 2},
- {6, 4},
- {6, 8},
- {14, 16},
- {30, 32},
- {62, 64},
- {126, 128}
- };
-
- ips = gd->arch.ips_clk;
- for (i = 7; i >= 0; i--) {
- for (j = 7; j >= 0; j--) {
- scl = 2 * (scltap[j].scl2tap +
- (SCL_Tap[i] - 1) * scltap[j].tap2tap
- + 2);
- if (ips <= speed*scl) {
- if ((speed*scl - ips) < bestmatch) {
- bestmatch = speed*scl - ips;
- best_i = i;
- best_j = j;
- best_speed = ips/scl;
- }
- }
- }
- }
- divider = (best_i & 3) | ((best_i & 4) << 3) | (best_j << 2);
- if (gd->flags & GD_FLG_RELOC) {
- fdr = divider;
- } else {
- debug("%ld kHz, \n", best_speed / 1000);
- return divider;
- }
- }
-
- return fdr;
-}
-
-int i2c_probe (uchar chip)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c512x_dev_t *regs = &im->i2c.dev[bus_num];
- int i;
-
- for (i = 0; i < I2C_RETRIES; i++) {
- mpc_reg_out (®s->mcr, I2C_STA, I2C_STA);
-
- if (! do_address (chip, 0)) {
- mpc_reg_out (®s->mcr, 0, I2C_STA);
- udelay (500);
- break;
- }
-
- mpc_reg_out (®s->mcr, 0, I2C_STA);
- udelay (500);
- }
-
- return (i == I2C_RETRIES);
-}
-
-int i2c_read (uchar chip, uint addr, int alen, uchar *buf, int len)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c512x_dev_t *regs = &im->i2c.dev[bus_num];
- char xaddr[4];
- int ret = -1;
-
- xaddr[0] = (addr >> 24) & 0xFF;
- xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
-
- if (wait_for_bb ()) {
- printf ("i2c_read: bus is busy\n");
- goto Done;
- }
-
- mpc_reg_out (®s->mcr, I2C_STA, I2C_STA);
- if (do_address (chip, 0)) {
- printf ("i2c_read: failed to address chip\n");
- goto Done;
- }
-
- if (send_bytes (chip, &xaddr[4-alen], alen)) {
- printf ("i2c_read: send_bytes failed\n");
- goto Done;
- }
-
- mpc_reg_out (®s->mcr, I2C_RSTA, I2C_RSTA);
- if (do_address (chip, 1)) {
- printf ("i2c_read: failed to address chip\n");
- goto Done;
- }
-
- if (receive_bytes (chip, (char *)buf, len)) {
- printf ("i2c_read: receive_bytes failed\n");
- goto Done;
- }
-
- ret = 0;
-Done:
- mpc_reg_out (®s->mcr, 0, I2C_STA);
- return ret;
-}
-
-int i2c_write (uchar chip, uint addr, int alen, uchar *buf, int len)
-{
- volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c512x_dev_t *regs = &im->i2c.dev[bus_num];
- char xaddr[4];
- int ret = -1;
-
- xaddr[0] = (addr >> 24) & 0xFF;
- xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
-
- if (wait_for_bb ()) {
- printf ("i2c_write: bus is busy\n");
- goto Done;
- }
-
- mpc_reg_out (®s->mcr, I2C_STA, I2C_STA);
- if (do_address (chip, 0)) {
- printf ("i2c_write: failed to address chip\n");
- goto Done;
- }
-
- if (send_bytes (chip, &xaddr[4-alen], alen)) {
- printf ("i2c_write: send_bytes failed\n");
- goto Done;
- }
-
- if (send_bytes (chip, (char *)buf, len)) {
- printf ("i2c_write: send_bytes failed\n");
- goto Done;
- }
-
- ret = 0;
-Done:
- mpc_reg_out (®s->mcr, 0, I2C_STA);
- return ret;
-}
-
-int i2c_set_bus_num (unsigned int bus)
-{
- if (bus >= I2C_BUS_CNT) {
- return -1;
- }
- bus_num = bus;
-
- return 0;
-}
-
-unsigned int i2c_get_bus_num (void)
-{
- return bus_num;
-}
-
-#endif /* CONFIG_HARD_I2C */
extra-y += traps.o
obj-y += io.o
obj-y += firmware_sc_task_bestcomm.impl.o
-obj-y += i2c.o
obj-y += cpu.o
obj-y += cpu_init.o
obj-y += ide.o
+++ /dev/null
-/*
- * (C) Copyright 2003
- * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#ifdef CONFIG_HARD_I2C
-
-#include <mpc5xxx.h>
-#include <i2c.h>
-
-#if !defined(CONFIG_I2C_MULTI_BUS)
-#if (CONFIG_SYS_I2C_MODULE == 2)
-#define I2C_BASE MPC5XXX_I2C2
-#elif (CONFIG_SYS_I2C_MODULE == 1)
-#define I2C_BASE MPC5XXX_I2C1
-#else
-#error CONFIG_SYS_I2C_MODULE is not properly configured
-#endif
-#else
-static unsigned int i2c_bus_num __attribute__ ((section (".data"))) =
- CONFIG_SYS_SPD_BUS_NUM;
-static unsigned int i2c_bus_speed[2] = {CONFIG_SYS_I2C_SPEED,
- CONFIG_SYS_I2C_SPEED};
-
-static const unsigned long i2c_dev[2] = {
- MPC5XXX_I2C1,
- MPC5XXX_I2C2,
-};
-
-#define I2C_BASE ((struct mpc5xxx_i2c *)i2c_dev[i2c_bus_num])
-#endif
-
-#define I2C_TIMEOUT 6667
-#define I2C_RETRIES 3
-
-struct mpc5xxx_i2c_tap {
- int scl2tap;
- int tap2tap;
-};
-
-static int mpc_reg_in (volatile u32 *reg);
-static void mpc_reg_out (volatile u32 *reg, int val, int mask);
-static int wait_for_bb (void);
-static int wait_for_pin (int *status);
-static int do_address (uchar chip, char rdwr_flag);
-static int send_bytes (uchar chip, char *buf, int len);
-static int receive_bytes (uchar chip, char *buf, int len);
-static int mpc_get_fdr (int);
-
-static int mpc_reg_in(volatile u32 *reg)
-{
- int ret = *reg >> 24;
- __asm__ __volatile__ ("eieio");
- return ret;
-}
-
-static void mpc_reg_out(volatile u32 *reg, int val, int mask)
-{
- int tmp;
-
- if (!mask) {
- *reg = val << 24;
- } else {
- tmp = mpc_reg_in(reg);
- *reg = ((tmp & ~mask) | (val & mask)) << 24;
- }
- __asm__ __volatile__ ("eieio");
-
- return;
-}
-
-static int wait_for_bb(void)
-{
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int timeout = I2C_TIMEOUT;
- int status;
-
- status = mpc_reg_in(®s->msr);
-
- while (timeout-- && (status & I2C_BB)) {
- mpc_reg_out(®s->mcr, I2C_STA, I2C_STA);
- (void)mpc_reg_in(®s->mdr);
- mpc_reg_out(®s->mcr, 0, I2C_STA);
- mpc_reg_out(®s->mcr, 0, 0);
- mpc_reg_out(®s->mcr, I2C_EN, 0);
- udelay(15);
- status = mpc_reg_in(®s->msr);
- }
-
- return (status & I2C_BB);
-}
-
-static int wait_for_pin(int *status)
-{
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int timeout = I2C_TIMEOUT;
-
- *status = mpc_reg_in(®s->msr);
-
- while (timeout-- && !(*status & I2C_IF)) {
- udelay(15);
- *status = mpc_reg_in(®s->msr);
- }
-
- if (!(*status & I2C_IF)) {
- return -1;
- }
-
- mpc_reg_out(®s->msr, 0, I2C_IF);
-
- return 0;
-}
-
-static int do_address(uchar chip, char rdwr_flag)
-{
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int status;
-
- chip <<= 1;
-
- if (rdwr_flag) {
- chip |= 1;
- }
-
- mpc_reg_out(®s->mcr, I2C_TX, I2C_TX);
- mpc_reg_out(®s->mdr, chip, 0);
-
- if (wait_for_pin(&status)) {
- return -2;
- }
-
- if (status & I2C_RXAK) {
- return -3;
- }
-
- return 0;
-}
-
-static int send_bytes(uchar chip, char *buf, int len)
-{
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int wrcount;
- int status;
-
- for (wrcount = 0; wrcount < len; ++wrcount) {
-
- mpc_reg_out(®s->mdr, buf[wrcount], 0);
-
- if (wait_for_pin(&status)) {
- break;
- }
-
- if (status & I2C_RXAK) {
- break;
- }
-
- }
-
- return !(wrcount == len);
-}
-
-static int receive_bytes(uchar chip, char *buf, int len)
-{
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int dummy = 1;
- int rdcount = 0;
- int status;
- int i;
-
- mpc_reg_out(®s->mcr, 0, I2C_TX);
-
- for (i = 0; i < len; ++i) {
- buf[rdcount] = mpc_reg_in(®s->mdr);
-
- if (dummy) {
- dummy = 0;
- } else {
- rdcount++;
- }
-
-
- if (wait_for_pin(&status)) {
- return -4;
- }
- }
-
- mpc_reg_out(®s->mcr, I2C_TXAK, I2C_TXAK);
- buf[rdcount++] = mpc_reg_in(®s->mdr);
-
- if (wait_for_pin(&status)) {
- return -5;
- }
-
- mpc_reg_out(®s->mcr, 0, I2C_TXAK);
-
- return 0;
-}
-
-#if defined(CONFIG_SYS_I2C_INIT_MPC5XXX)
-
-#define FDR510(x) (u8) (((x & 0x20) >> 3) | (x & 0x3))
-#define FDR432(x) (u8) ((x & 0x1C) >> 2)
-/*
- * Reset any i2c devices that may have been interrupted during a system reset.
- * Normally this would be accomplished by clocking the line until SCL and SDA
- * are released and then sending a start condtiion (From an Atmel datasheet).
- * There is no direct access to the i2c pins so instead create start commands
- * through the i2c interface. Send a start command then delay for the SDA Hold
- * time, repeat this by disabling/enabling the bus a total of 9 times.
- */
-static void send_reset(void)
-{
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int i;
- u32 delay;
- u8 fdr;
- int SDA_Tap[] = { 3, 3, 4, 4, 1, 1, 2, 2};
- struct mpc5xxx_i2c_tap scltap[] = {
- {4, 1},
- {4, 2},
- {6, 4},
- {6, 8},
- {14, 16},
- {30, 32},
- {62, 64},
- {126, 128}
- };
-
- fdr = (u8)mpc_reg_in(®s->mfdr);
-
- delay = scltap[FDR432(fdr)].scl2tap + ((SDA_Tap[FDR510(fdr)] - 1) * \
- scltap[FDR432(fdr)].tap2tap) + 3;
-
- for (i = 0; i < 9; i++) {
- mpc_reg_out(®s->mcr, I2C_EN|I2C_STA|I2C_TX, I2C_INIT_MASK);
- udelay(delay);
- mpc_reg_out(®s->mcr, 0, I2C_INIT_MASK);
- udelay(delay);
- }
-
- mpc_reg_out(®s->mcr, I2C_EN, I2C_INIT_MASK);
-}
-#endif /* CONFIG_SYS_I2c_INIT_MPC5XXX */
-
-/**************** I2C API ****************/
-
-void i2c_init(int speed, int saddr)
-{
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
-
- mpc_reg_out(®s->mcr, 0, 0);
- mpc_reg_out(®s->madr, saddr << 1, 0);
-
- /* Set clock
- */
- mpc_reg_out(®s->mfdr, mpc_get_fdr(speed), 0);
-
- /* Enable module
- */
- mpc_reg_out(®s->mcr, I2C_EN, I2C_INIT_MASK);
- mpc_reg_out(®s->msr, 0, I2C_IF);
-
-#if defined(CONFIG_SYS_I2C_INIT_MPC5XXX)
- send_reset();
-#endif
- return;
-}
-
-static int mpc_get_fdr(int speed)
-{
- static int fdr = -1;
-
- if (fdr == -1) {
- ulong best_speed = 0;
- ulong divider;
- ulong ipb, scl;
- ulong bestmatch = 0xffffffffUL;
- int best_i = 0, best_j = 0, i, j;
- int SCL_Tap[] = { 9, 10, 12, 15, 5, 6, 7, 8};
- struct mpc5xxx_i2c_tap scltap[] = {
- {4, 1},
- {4, 2},
- {6, 4},
- {6, 8},
- {14, 16},
- {30, 32},
- {62, 64},
- {126, 128}
- };
-
- ipb = gd->arch.ipb_clk;
- for (i = 7; i >= 0; i--) {
- for (j = 7; j >= 0; j--) {
- scl = 2 * (scltap[j].scl2tap +
- (SCL_Tap[i] - 1) * scltap[j].tap2tap + 2);
- if (ipb <= speed*scl) {
- if ((speed*scl - ipb) < bestmatch) {
- bestmatch = speed*scl - ipb;
- best_i = i;
- best_j = j;
- best_speed = ipb/scl;
- }
- }
- }
- }
- divider = (best_i & 3) | ((best_i & 4) << 3) | (best_j << 2);
- if (gd->flags & GD_FLG_RELOC) {
- fdr = divider;
- } else {
- printf("%ld kHz, ", best_speed / 1000);
- return divider;
- }
- }
-
- return fdr;
-}
-
-int i2c_probe(uchar chip)
-{
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int i;
-
- for (i = 0; i < I2C_RETRIES; i++) {
- mpc_reg_out(®s->mcr, I2C_STA, I2C_STA);
-
- if (! do_address(chip, 0)) {
- mpc_reg_out(®s->mcr, 0, I2C_STA);
- udelay(500);
- break;
- }
-
- mpc_reg_out(®s->mcr, 0, I2C_STA);
- udelay(500);
- }
-
- return (i == I2C_RETRIES);
-}
-
-int i2c_read(uchar chip, uint addr, int alen, uchar *buf, int len)
-{
- char xaddr[4];
- struct mpc5xxx_i2c * regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int ret = -1;
-
- xaddr[0] = (addr >> 24) & 0xFF;
- xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
-
- if (wait_for_bb()) {
- printf("i2c_read: bus is busy\n");
- goto Done;
- }
-
- mpc_reg_out(®s->mcr, I2C_STA, I2C_STA);
- if (do_address(chip, 0)) {
- printf("i2c_read: failed to address chip\n");
- goto Done;
- }
-
- if (send_bytes(chip, &xaddr[4-alen], alen)) {
- printf("i2c_read: send_bytes failed\n");
- goto Done;
- }
-
- mpc_reg_out(®s->mcr, I2C_RSTA, I2C_RSTA);
- if (do_address(chip, 1)) {
- printf("i2c_read: failed to address chip\n");
- goto Done;
- }
-
- if (receive_bytes(chip, (char *)buf, len)) {
- printf("i2c_read: receive_bytes failed\n");
- goto Done;
- }
-
- ret = 0;
-Done:
- mpc_reg_out(®s->mcr, 0, I2C_STA);
- return ret;
-}
-
-int i2c_write(uchar chip, uint addr, int alen, uchar *buf, int len)
-{
- char xaddr[4];
- struct mpc5xxx_i2c *regs = (struct mpc5xxx_i2c *)I2C_BASE;
- int ret = -1;
-
- xaddr[0] = (addr >> 24) & 0xFF;
- xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
-
- if (wait_for_bb()) {
- printf("i2c_write: bus is busy\n");
- goto Done;
- }
-
- mpc_reg_out(®s->mcr, I2C_STA, I2C_STA);
- if (do_address(chip, 0)) {
- printf("i2c_write: failed to address chip\n");
- goto Done;
- }
-
- if (send_bytes(chip, &xaddr[4-alen], alen)) {
- printf("i2c_write: send_bytes failed\n");
- goto Done;
- }
-
- if (send_bytes(chip, (char *)buf, len)) {
- printf("i2c_write: send_bytes failed\n");
- goto Done;
- }
-
- ret = 0;
-Done:
- mpc_reg_out(®s->mcr, 0, I2C_STA);
- return ret;
-}
-
-#if defined(CONFIG_I2C_MULTI_BUS)
-int i2c_set_bus_num(unsigned int bus)
-{
- if (bus > 1)
- return -1;
-
- i2c_bus_num = bus;
- i2c_init(i2c_bus_speed[bus], CONFIG_SYS_I2C_SLAVE);
- return 0;
-}
-
-int i2c_set_bus_speed(unsigned int speed)
-{
- i2c_init(speed, CONFIG_SYS_I2C_SLAVE);
- return 0;
-}
-
-unsigned int i2c_get_bus_num(void)
-{
- return i2c_bus_num;
-}
-
-unsigned int i2c_get_bus_speed(void)
-{
- return i2c_bus_speed[i2c_bus_num];
-}
-#endif
-
-
-#endif /* CONFIG_HARD_I2C */
extra-y = start.o
obj-y = traps.o serial_smc.o serial_scc.o cpu.o cpu_init.o speed.o \
- interrupts.o ether_fcc.o i2c.o commproc.o \
+ interrupts.o ether_fcc.o commproc.o \
bedbug_603e.o pci.o spi.o kgdb.o
obj-$(CONFIG_ETHER_ON_SCC) += ether_scc.o
do { /* Spin until command processed */
__asm__ __volatile__ ("eieio");
} while ((immr->im_cpm.cp_cpcr & CPM_CR_FLG) && ++count < 1000000);
-
-#ifdef CONFIG_HARD_I2C
- immr->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)] = 0;
-#endif
}
/* Allocate some memory from the dual ported ram.
+++ /dev/null
-/*
- * (C) Copyright 2000
- * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
- *
- * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger@sysgo.de>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <console.h>
-
-#if defined(CONFIG_HARD_I2C)
-
-#include <asm/cpm_8260.h>
-#include <i2c.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-#if defined(CONFIG_I2C_MULTI_BUS)
-static unsigned int i2c_bus_num __attribute__ ((section(".data"))) = 0;
-#endif /* CONFIG_I2C_MULTI_BUS */
-
-/* uSec to wait between polls of the i2c */
-#define DELAY_US 100
-/* uSec to wait for the CPM to start processing the buffer */
-#define START_DELAY_US 1000
-
-/*
- * tx/rx per-byte timeout: we delay DELAY_US uSec between polls so the
- * timeout will be (tx_length + rx_length) * DELAY_US * TOUT_LOOP
- */
-#define TOUT_LOOP 5
-
-/*
- * Set default values
- */
-#ifndef CONFIG_SYS_I2C_SPEED
-#define CONFIG_SYS_I2C_SPEED 50000
-#endif
-
-
-typedef void (*i2c_ecb_t) (int, int, void *); /* error callback function */
-
-/* This structure keeps track of the bd and buffer space usage. */
-typedef struct i2c_state {
- int rx_idx; /* index to next free Rx BD */
- int tx_idx; /* index to next free Tx BD */
- void *rxbd; /* pointer to next free Rx BD */
- void *txbd; /* pointer to next free Tx BD */
- int tx_space; /* number of Tx bytes left */
- unsigned char *tx_buf; /* pointer to free Tx area */
- i2c_ecb_t err_cb; /* error callback function */
- void *cb_data; /* private data to be passed */
-} i2c_state_t;
-
-/* flags for i2c_send() and i2c_receive() */
-#define I2CF_ENABLE_SECONDARY 0x01 /* secondary_address is valid */
-#define I2CF_START_COND 0x02 /* tx: generate start condition */
-#define I2CF_STOP_COND 0x04 /* tx: generate stop condition */
-
-/* return codes */
-#define I2CERR_NO_BUFFERS 1 /* no more BDs or buffer space */
-#define I2CERR_MSG_TOO_LONG 2 /* tried to send/receive to much data */
-#define I2CERR_TIMEOUT 3 /* timeout in i2c_doio() */
-#define I2CERR_QUEUE_EMPTY 4 /* i2c_doio called without send/rcv */
-#define I2CERR_IO_ERROR 5 /* had an error during comms */
-
-/* error callback flags */
-#define I2CECB_RX_ERR 0x10 /* this is a receive error */
-#define I2CECB_RX_OV 0x02 /* receive overrun error */
-#define I2CECB_RX_MASK 0x0f /* mask for error bits */
-#define I2CECB_TX_ERR 0x20 /* this is a transmit error */
-#define I2CECB_TX_CL 0x01 /* transmit collision error */
-#define I2CECB_TX_UN 0x02 /* transmit underflow error */
-#define I2CECB_TX_NAK 0x04 /* transmit no ack error */
-#define I2CECB_TX_MASK 0x0f /* mask for error bits */
-#define I2CECB_TIMEOUT 0x40 /* this is a timeout error */
-
-#define ERROR_I2C_NONE 0
-#define ERROR_I2C_LENGTH 1
-
-#define I2C_WRITE_BIT 0x00
-#define I2C_READ_BIT 0x01
-
-#define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */
-
-
-#define NUM_RX_BDS 4
-#define NUM_TX_BDS 4
-#define MAX_TX_SPACE 256
-
-typedef struct I2C_BD {
- unsigned short status;
- unsigned short length;
- unsigned char *addr;
-} I2C_BD;
-
-#define BD_I2C_TX_START 0x0400 /* special status for i2c: Start condition */
-
-#define BD_I2C_TX_CL 0x0001 /* collision error */
-#define BD_I2C_TX_UN 0x0002 /* underflow error */
-#define BD_I2C_TX_NAK 0x0004 /* no acknowledge error */
-#define BD_I2C_TX_ERR (BD_I2C_TX_NAK|BD_I2C_TX_UN|BD_I2C_TX_CL)
-
-#define BD_I2C_RX_ERR BD_SC_OV
-
-/*
- * Returns the best value of I2BRG to meet desired clock speed of I2C with
- * input parameters (clock speed, filter, and predivider value).
- * It returns computer speed value and the difference between it and desired
- * speed.
- */
-static inline int
-i2c_roundrate(int hz, int speed, int filter, int modval,
- int *brgval, int *totspeed)
-{
- int moddiv = 1 << (5 - (modval & 3)), brgdiv, div;
-
- debug("\t[I2C] trying hz=%d, speed=%d, filter=%d, modval=%d\n",
- hz, speed, filter, modval);
-
- div = moddiv * speed;
- brgdiv = (hz + div - 1) / div;
-
- debug("\t\tmoddiv=%d, brgdiv=%d\n", moddiv, brgdiv);
-
- *brgval = ((brgdiv + 1) / 2) - 3 - (2 * filter);
-
- if ((*brgval < 0) || (*brgval > 255)) {
- debug("\t\trejected brgval=%d\n", *brgval);
- return -1;
- }
-
- brgdiv = 2 * (*brgval + 3 + (2 * filter));
- div = moddiv * brgdiv;
- *totspeed = hz / div;
-
- debug("\t\taccepted brgval=%d, totspeed=%d\n", *brgval, *totspeed);
-
- return 0;
-}
-
-/*
- * Sets the I2C clock predivider and divider to meet required clock speed.
- */
-static int i2c_setrate(int hz, int speed)
-{
- immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
- volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
- int brgval,
- modval, /* 0-3 */
- bestspeed_diff = speed,
- bestspeed_brgval = 0,
- bestspeed_modval = 0,
- bestspeed_filter = 0,
- totspeed,
- filter = 0; /* Use this fixed value */
-
- for (modval = 0; modval < 4; modval++) {
- if (i2c_roundrate(hz, speed, filter, modval, &brgval, &totspeed)
- == 0) {
- int diff = speed - totspeed;
-
- if ((diff >= 0) && (diff < bestspeed_diff)) {
- bestspeed_diff = diff;
- bestspeed_modval = modval;
- bestspeed_brgval = brgval;
- bestspeed_filter = filter;
- }
- }
- }
-
- debug("[I2C] Best is:\n");
- debug("[I2C] CPU=%dhz RATE=%d F=%d I2MOD=%08x I2BRG=%08x DIFF=%dhz\n",
- hz, speed, bestspeed_filter, bestspeed_modval, bestspeed_brgval,
- bestspeed_diff);
-
- i2c->i2c_i2mod |= ((bestspeed_modval & 3) << 1) |
- (bestspeed_filter << 3);
- i2c->i2c_i2brg = bestspeed_brgval & 0xff;
-
- debug("[I2C] i2mod=%08x i2brg=%08x\n", i2c->i2c_i2mod,
- i2c->i2c_i2brg);
-
- return 1;
-}
-
-void i2c_init(int speed, int slaveadd)
-{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
- volatile cpm8260_t *cp = (cpm8260_t *)&immap->im_cpm;
- volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
- volatile iic_t *iip;
- ulong rbase, tbase;
- volatile I2C_BD *rxbd, *txbd;
- uint dpaddr;
-
-#ifdef CONFIG_SYS_I2C_INIT_BOARD
- /*
- * call board specific i2c bus reset routine before accessing the
- * environment, which might be in a chip on that bus. For details
- * about this problem see doc/I2C_Edge_Conditions.
- */
- i2c_init_board();
-#endif
-
- dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
- if (dpaddr == 0) {
- /* need to allocate dual port ram */
- dpaddr = m8260_cpm_dpalloc(64 +
- (NUM_RX_BDS * sizeof(I2C_BD)) +
- (NUM_TX_BDS * sizeof(I2C_BD)) +
- MAX_TX_SPACE, 64);
- immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)] =
- dpaddr;
- }
-
- /*
- * initialise data in dual port ram:
- *
- * dpaddr -> parameter ram (64 bytes)
- * rbase -> rx BD (NUM_RX_BDS * sizeof(I2C_BD) bytes)
- * tbase -> tx BD (NUM_TX_BDS * sizeof(I2C_BD) bytes)
- * tx buffer (MAX_TX_SPACE bytes)
- */
-
- iip = (iic_t *)&immap->im_dprambase[dpaddr];
- memset((void *)iip, 0, sizeof(iic_t));
-
- rbase = dpaddr + 64;
- tbase = rbase + NUM_RX_BDS * sizeof(I2C_BD);
-
- /* Disable interrupts */
- i2c->i2c_i2mod = 0x00;
- i2c->i2c_i2cmr = 0x00;
- i2c->i2c_i2cer = 0xff;
- i2c->i2c_i2add = slaveadd;
-
- /*
- * Set the I2C BRG Clock division factor from desired i2c rate
- * and current CPU rate (we assume sccr dfbgr field is 0;
- * divide BRGCLK by 1)
- */
- debug("[I2C] Setting rate...\n");
- i2c_setrate(gd->arch.brg_clk, CONFIG_SYS_I2C_SPEED);
-
- /* Set I2C controller in master mode */
- i2c->i2c_i2com = 0x01;
-
- /* Initialize Tx/Rx parameters */
- iip->iic_rbase = rbase;
- iip->iic_tbase = tbase;
- rxbd = (I2C_BD *)((unsigned char *) &immap->
- im_dprambase[iip->iic_rbase]);
- txbd = (I2C_BD *)((unsigned char *) &immap->
- im_dprambase[iip->iic_tbase]);
-
- debug("[I2C] rbase = %04x\n", iip->iic_rbase);
- debug("[I2C] tbase = %04x\n", iip->iic_tbase);
- debug("[I2C] rxbd = %08x\n", (int) rxbd);
- debug("[I2C] txbd = %08x\n", (int) txbd);
-
- /* Set big endian byte order */
- iip->iic_tfcr = 0x10;
- iip->iic_rfcr = 0x10;
-
- /* Set maximum receive size. */
- iip->iic_mrblr = I2C_RXTX_LEN;
-
- cp->cp_cpcr = mk_cr_cmd(CPM_CR_I2C_PAGE,
- CPM_CR_I2C_SBLOCK,
- 0x00, CPM_CR_INIT_TRX) | CPM_CR_FLG;
- do {
- __asm__ __volatile__("eieio");
- } while (cp->cp_cpcr & CPM_CR_FLG);
-
- /* Clear events and interrupts */
- i2c->i2c_i2cer = 0xff;
- i2c->i2c_i2cmr = 0x00;
-}
-
-static
-void i2c_newio(i2c_state_t *state)
-{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
- volatile iic_t *iip;
- uint dpaddr;
-
- debug("[I2C] i2c_newio\n");
-
- dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
- iip = (iic_t *)&immap->im_dprambase[dpaddr];
- state->rx_idx = 0;
- state->tx_idx = 0;
- state->rxbd = (void *)&immap->im_dprambase[iip->iic_rbase];
- state->txbd = (void *)&immap->im_dprambase[iip->iic_tbase];
- state->tx_space = MAX_TX_SPACE;
- state->tx_buf = (uchar *)state->txbd + NUM_TX_BDS * sizeof(I2C_BD);
- state->err_cb = NULL;
- state->cb_data = NULL;
-
- debug("[I2C] rxbd = %08x\n", (int)state->rxbd);
- debug("[I2C] txbd = %08x\n", (int)state->txbd);
- debug("[I2C] tx_buf = %08x\n", (int)state->tx_buf);
-
- /* clear the buffer memory */
- memset((char *) state->tx_buf, 0, MAX_TX_SPACE);
-}
-
-static
-int i2c_send(i2c_state_t *state,
- unsigned char address,
- unsigned char secondary_address,
- unsigned int flags, unsigned short size, unsigned char *dataout)
-{
- volatile I2C_BD *txbd;
- int i, j;
-
- debug("[I2C] i2c_send add=%02d sec=%02d flag=%02d size=%d\n",
- address, secondary_address, flags, size);
-
- /* trying to send message larger than BD */
- if (size > I2C_RXTX_LEN)
- return I2CERR_MSG_TOO_LONG;
-
- /* no more free bds */
- if (state->tx_idx >= NUM_TX_BDS || state->tx_space < (2 + size))
- return I2CERR_NO_BUFFERS;
-
- txbd = (I2C_BD *)state->txbd;
- txbd->addr = state->tx_buf;
-
- debug("[I2C] txbd = %08x\n", (int) txbd);
-
- if (flags & I2CF_START_COND) {
- debug("[I2C] Formatting addresses...\n");
- if (flags & I2CF_ENABLE_SECONDARY) {
- /* Length of message plus dest addresses */
- txbd->length = size + 2;
- txbd->addr[0] = address << 1;
- txbd->addr[1] = secondary_address;
- i = 2;
- } else {
- /* Length of message plus dest address */
- txbd->length = size + 1;
- /* Write destination address to BD */
- txbd->addr[0] = address << 1;
- i = 1;
- }
- } else {
- txbd->length = size; /* Length of message */
- i = 0;
- }
-
- /* set up txbd */
- txbd->status = BD_SC_READY;
- if (flags & I2CF_START_COND)
- txbd->status |= BD_I2C_TX_START;
- if (flags & I2CF_STOP_COND)
- txbd->status |= BD_SC_LAST | BD_SC_WRAP;
-
- /* Copy data to send into buffer */
- debug("[I2C] copy data...\n");
- for (j = 0; j < size; i++, j++)
- txbd->addr[i] = dataout[j];
-
- debug("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- txbd->length, txbd->status, txbd->addr[0], txbd->addr[1]);
-
- /* advance state */
- state->tx_buf += txbd->length;
- state->tx_space -= txbd->length;
- state->tx_idx++;
- state->txbd = (void *) (txbd + 1);
-
- return 0;
-}
-
-static
-int i2c_receive(i2c_state_t *state,
- unsigned char address,
- unsigned char secondary_address,
- unsigned int flags,
- unsigned short size_to_expect, unsigned char *datain)
-{
- volatile I2C_BD *rxbd, *txbd;
-
- debug("[I2C] i2c_receive %02d %02d %02d\n", address,
- secondary_address, flags);
-
- /* Expected to receive too much */
- if (size_to_expect > I2C_RXTX_LEN)
- return I2CERR_MSG_TOO_LONG;
-
- /* no more free bds */
- if (state->tx_idx >= NUM_TX_BDS || state->rx_idx >= NUM_RX_BDS
- || state->tx_space < 2)
- return I2CERR_NO_BUFFERS;
-
- rxbd = (I2C_BD *) state->rxbd;
- txbd = (I2C_BD *) state->txbd;
-
- debug("[I2C] rxbd = %08x\n", (int) rxbd);
- debug("[I2C] txbd = %08x\n", (int) txbd);
-
- txbd->addr = state->tx_buf;
-
- /* set up TXBD for destination address */
- if (flags & I2CF_ENABLE_SECONDARY) {
- txbd->length = 2;
- txbd->addr[0] = address << 1; /* Write data */
- txbd->addr[1] = secondary_address; /* Internal address */
- txbd->status = BD_SC_READY;
- } else {
- txbd->length = 1 + size_to_expect;
- txbd->addr[0] = (address << 1) | 0x01;
- txbd->status = BD_SC_READY;
- memset(&txbd->addr[1], 0, txbd->length);
- }
-
- /* set up rxbd for reception */
- rxbd->status = BD_SC_EMPTY;
- rxbd->length = size_to_expect;
- rxbd->addr = datain;
-
- txbd->status |= BD_I2C_TX_START;
- if (flags & I2CF_STOP_COND) {
- txbd->status |= BD_SC_LAST | BD_SC_WRAP;
- rxbd->status |= BD_SC_WRAP;
- }
-
- debug("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- txbd->length, txbd->status, txbd->addr[0], txbd->addr[1]);
- debug("[I2C] rxbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- rxbd->length, rxbd->status, rxbd->addr[0], rxbd->addr[1]);
-
- /* advance state */
- state->tx_buf += txbd->length;
- state->tx_space -= txbd->length;
- state->tx_idx++;
- state->txbd = (void *) (txbd + 1);
- state->rx_idx++;
- state->rxbd = (void *) (rxbd + 1);
-
- return 0;
-}
-
-
-static
-int i2c_doio(i2c_state_t *state)
-{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
- volatile iic_t *iip;
- volatile i2c8260_t *i2c = (i2c8260_t *)&immap->im_i2c;
- volatile I2C_BD *txbd, *rxbd;
- int n, i, b, rxcnt = 0, rxtimeo = 0, txcnt = 0, txtimeo = 0, rc = 0;
- uint dpaddr;
-
- debug("[I2C] i2c_doio\n");
-
- if (state->tx_idx <= 0 && state->rx_idx <= 0) {
- debug("[I2C] No I/O is queued\n");
- return I2CERR_QUEUE_EMPTY;
- }
-
- dpaddr = immap->im_dprambase16[PROFF_I2C_BASE / sizeof(u16)];
- iip = (iic_t *)&immap->im_dprambase[dpaddr];
- iip->iic_rbptr = iip->iic_rbase;
- iip->iic_tbptr = iip->iic_tbase;
-
- /* Enable I2C */
- debug("[I2C] Enabling I2C...\n");
- i2c->i2c_i2mod |= 0x01;
-
- /* Begin transmission */
- i2c->i2c_i2com |= 0x80;
-
- /* Loop until transmit & receive completed */
-
- n = state->tx_idx;
-
- if (n > 0) {
-
- txbd = ((I2C_BD *) state->txbd) - n;
- for (i = 0; i < n; i++) {
- txtimeo += TOUT_LOOP * txbd->length;
- txbd++;
- }
-
- txbd--; /* wait until last in list is done */
-
- debug("[I2C] Transmitting...(txbd=0x%08lx)\n",
- (ulong) txbd);
-
- udelay(START_DELAY_US); /* give it time to start */
- while ((txbd->status & BD_SC_READY) && (++txcnt < txtimeo)) {
- udelay(DELAY_US);
- if (ctrlc())
- return -1;
- __asm__ __volatile__("eieio");
- }
- }
-
- n = state->rx_idx;
-
- if (txcnt < txtimeo && n > 0) {
-
- rxbd = ((I2C_BD *) state->rxbd) - n;
- for (i = 0; i < n; i++) {
- rxtimeo += TOUT_LOOP * rxbd->length;
- rxbd++;
- }
-
- rxbd--; /* wait until last in list is done */
-
- debug("[I2C] Receiving...(rxbd=0x%08lx)\n", (ulong) rxbd);
-
- udelay(START_DELAY_US); /* give it time to start */
- while ((rxbd->status & BD_SC_EMPTY) && (++rxcnt < rxtimeo)) {
- udelay(DELAY_US);
- if (ctrlc())
- return -1;
- __asm__ __volatile__("eieio");
- }
- }
-
- /* Turn off I2C */
- i2c->i2c_i2mod &= ~0x01;
-
- n = state->tx_idx;
-
- if (n > 0) {
- for (i = 0; i < n; i++) {
- txbd = ((I2C_BD *) state->txbd) - (n - i);
- b = txbd->status & BD_I2C_TX_ERR;
- if (b != 0) {
- if (state->err_cb != NULL)
- (*state->err_cb) (I2CECB_TX_ERR | b,
- i, state->cb_data);
- if (rc == 0)
- rc = I2CERR_IO_ERROR;
- }
- }
- }
-
- n = state->rx_idx;
-
- if (n > 0) {
- for (i = 0; i < n; i++) {
- rxbd = ((I2C_BD *) state->rxbd) - (n - i);
- b = rxbd->status & BD_I2C_RX_ERR;
- if (b != 0) {
- if (state->err_cb != NULL)
- (*state->err_cb) (I2CECB_RX_ERR | b,
- i, state->cb_data);
- if (rc == 0)
- rc = I2CERR_IO_ERROR;
- }
- }
- }
-
- if ((txtimeo > 0 && txcnt >= txtimeo) ||
- (rxtimeo > 0 && rxcnt >= rxtimeo)) {
- if (state->err_cb != NULL)
- (*state->err_cb) (I2CECB_TIMEOUT, -1, state->cb_data);
- if (rc == 0)
- rc = I2CERR_TIMEOUT;
- }
-
- return rc;
-}
-
-static void i2c_probe_callback(int flags, int xnum, void *data)
-{
- /*
- * the only acceptable errors are a transmit NAK or a receive
- * overrun - tx NAK means the device does not exist, rx OV
- * means the device must have responded to the slave address
- * even though the transfer failed
- */
- if (flags == (I2CECB_TX_ERR | I2CECB_TX_NAK))
- *(int *) data |= 1;
- if (flags == (I2CECB_RX_ERR | I2CECB_RX_OV))
- *(int *) data |= 2;
-}
-
-int i2c_probe(uchar chip)
-{
- i2c_state_t state;
- int rc, err_flag;
- uchar buf[1];
-
- i2c_newio(&state);
-
- state.err_cb = i2c_probe_callback;
- state.cb_data = (void *) &err_flag;
- err_flag = 0;
-
- rc = i2c_receive(&state, chip, 0, I2CF_START_COND | I2CF_STOP_COND, 1,
- buf);
-
- if (rc != 0)
- return rc; /* probe failed */
-
- rc = i2c_doio(&state);
-
- if (rc == 0)
- return 0; /* device exists - read succeeded */
-
- if (rc == I2CERR_TIMEOUT)
- return -1; /* device does not exist - timeout */
-
- if (rc != I2CERR_IO_ERROR || err_flag == 0)
- return rc; /* probe failed */
-
- if (err_flag & 1)
- return -1; /* device does not exist - had transmit NAK */
-
- return 0; /* device exists - had receive overrun */
-}
-
-
-int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
- i2c_state_t state;
- uchar xaddr[4];
- int rc;
-
- xaddr[0] = (addr >> 24) & 0xFF;
- xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
-
-#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
- /*
- * EEPROM chips that implement "address overflow" are ones
- * like Catalyst 24WC04/08/16 which has 9/10/11 bits of address
- * and the extra bits end up in the "chip address" bit slots.
- * This makes a 24WC08 (1Kbyte) chip look like four 256 byte
- * chips.
- *
- * Note that we consider the length of the address field to still
- * be one byte because the extra address bits are hidden in the
- * chip address.
- */
- chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
-#endif
-
- i2c_newio(&state);
-
- rc = i2c_send(&state, chip, 0, I2CF_START_COND, alen,
- &xaddr[4 - alen]);
- if (rc != 0) {
- printf("i2c_read: i2c_send failed (%d)\n", rc);
- return 1;
- }
-
- rc = i2c_receive(&state, chip, 0, I2CF_STOP_COND, len, buffer);
- if (rc != 0) {
- printf("i2c_read: i2c_receive failed (%d)\n", rc);
- return 1;
- }
-
- rc = i2c_doio(&state);
- if (rc != 0) {
- printf("i2c_read: i2c_doio failed (%d)\n", rc);
- return 1;
- }
- return 0;
-}
-
-int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
- i2c_state_t state;
- uchar xaddr[4];
- int rc;
-
- xaddr[0] = (addr >> 24) & 0xFF;
- xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
-
-#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
- /*
- * EEPROM chips that implement "address overflow" are ones
- * like Catalyst 24WC04/08/16 which has 9/10/11 bits of address
- * and the extra bits end up in the "chip address" bit slots.
- * This makes a 24WC08 (1Kbyte) chip look like four 256 byte
- * chips.
- *
- * Note that we consider the length of the address field to still
- * be one byte because the extra address bits are hidden in the
- * chip address.
- */
- chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
-#endif
-
- i2c_newio(&state);
-
- rc = i2c_send(&state, chip, 0, I2CF_START_COND, alen,
- &xaddr[4 - alen]);
- if (rc != 0) {
- printf("i2c_write: first i2c_send failed (%d)\n", rc);
- return 1;
- }
-
- rc = i2c_send(&state, 0, 0, I2CF_STOP_COND, len, buffer);
- if (rc != 0) {
- printf("i2c_write: second i2c_send failed (%d)\n", rc);
- return 1;
- }
-
- rc = i2c_doio(&state);
- if (rc != 0) {
- printf("i2c_write: i2c_doio failed (%d)\n", rc);
- return 1;
- }
- return 0;
-}
-
-#if defined(CONFIG_I2C_MULTI_BUS)
-/*
- * Functions for multiple I2C bus handling
- */
-unsigned int i2c_get_bus_num(void)
-{
- return i2c_bus_num;
-}
-
-int i2c_set_bus_num(unsigned int bus)
-{
- if (bus >= CONFIG_SYS_MAX_I2C_BUS)
- return -1;
- i2c_bus_num = bus;
- return 0;
-}
-
-#endif /* CONFIG_I2C_MULTI_BUS */
-#endif /* CONFIG_HARD_I2C */
obj-y += cpu_init.o
obj-y += fec.o
obj-$(CONFIG_OF_LIBFDT) += fdt.o
-obj-y += i2c.o
obj-y += interrupts.o
obj-y += scc.o
obj-y += serial.o
+++ /dev/null
-/*
- * (C) Copyright 2000
- * Paolo Scaffardi, AIRVENT SAM s.p.a - RIMINI(ITALY), arsenio@tin.it
- *
- * (C) Copyright 2000 Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger@sysgo.de>
- *
- * SPDX-License-Identifier: GPL-2.0+
- *
- * Back ported to the 8xx platform (from the 8260 platform) by
- * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
- */
-
-#include <common.h>
-#include <console.h>
-
-#ifdef CONFIG_HARD_I2C
-
-#include <commproc.h>
-#include <i2c.h>
-
-DECLARE_GLOBAL_DATA_PTR;
-
-/* tx/rx timeout (we need the i2c early, so we don't use get_timer()) */
-#define TOUT_LOOP 1000000
-
-#define NUM_RX_BDS 4
-#define NUM_TX_BDS 4
-#define MAX_TX_SPACE 256
-#define I2C_RXTX_LEN 128 /* maximum tx/rx buffer length */
-
-typedef struct I2C_BD {
- unsigned short status;
- unsigned short length;
- unsigned char *addr;
-} I2C_BD;
-
-#define BD_I2C_TX_START 0x0400 /* special status for i2c: Start condition */
-
-#define BD_I2C_TX_CL 0x0001 /* collision error */
-#define BD_I2C_TX_UN 0x0002 /* underflow error */
-#define BD_I2C_TX_NAK 0x0004 /* no acknowledge error */
-#define BD_I2C_TX_ERR (BD_I2C_TX_NAK|BD_I2C_TX_UN|BD_I2C_TX_CL)
-
-#define BD_I2C_RX_ERR BD_SC_OV
-
-typedef void (*i2c_ecb_t) (int, int); /* error callback function */
-
-/* This structure keeps track of the bd and buffer space usage. */
-typedef struct i2c_state {
- int rx_idx; /* index to next free Rx BD */
- int tx_idx; /* index to next free Tx BD */
- void *rxbd; /* pointer to next free Rx BD */
- void *txbd; /* pointer to next free Tx BD */
- int tx_space; /* number of Tx bytes left */
- unsigned char *tx_buf; /* pointer to free Tx area */
- i2c_ecb_t err_cb; /* error callback function */
-} i2c_state_t;
-
-
-/* flags for i2c_send() and i2c_receive() */
-#define I2CF_ENABLE_SECONDARY 0x01 /* secondary_address is valid */
-#define I2CF_START_COND 0x02 /* tx: generate start condition */
-#define I2CF_STOP_COND 0x04 /* tx: generate stop condition */
-
-/* return codes */
-#define I2CERR_NO_BUFFERS 0x01 /* no more BDs or buffer space */
-#define I2CERR_MSG_TOO_LONG 0x02 /* tried to send/receive to much data */
-#define I2CERR_TIMEOUT 0x03 /* timeout in i2c_doio() */
-#define I2CERR_QUEUE_EMPTY 0x04 /* i2c_doio called without send/receive */
-
-/* error callback flags */
-#define I2CECB_RX_ERR 0x10 /* this is a receive error */
-#define I2CECB_RX_ERR_OV 0x02 /* receive overrun error */
-#define I2CECB_RX_MASK 0x0f /* mask for error bits */
-#define I2CECB_TX_ERR 0x20 /* this is a transmit error */
-#define I2CECB_TX_CL 0x01 /* transmit collision error */
-#define I2CECB_TX_UN 0x02 /* transmit underflow error */
-#define I2CECB_TX_NAK 0x04 /* transmit no ack error */
-#define I2CECB_TX_MASK 0x0f /* mask for error bits */
-#define I2CECB_TIMEOUT 0x40 /* this is a timeout error */
-
-/*
- * Returns the best value of I2BRG to meet desired clock speed of I2C with
- * input parameters (clock speed, filter, and predivider value).
- * It returns computer speed value and the difference between it and desired
- * speed.
- */
-static inline int
-i2c_roundrate(int hz, int speed, int filter, int modval,
- int *brgval, int *totspeed)
-{
- int moddiv = 1 << (5 - (modval & 3)), brgdiv, div;
-
- debug("\t[I2C] trying hz=%d, speed=%d, filter=%d, modval=%d\n",
- hz, speed, filter, modval);
-
- div = moddiv * speed;
- brgdiv = (hz + div - 1) / div;
-
- debug("\t\tmoddiv=%d, brgdiv=%d\n", moddiv, brgdiv);
-
- *brgval = ((brgdiv + 1) / 2) - 3 - (2 * filter);
-
- if ((*brgval < 0) || (*brgval > 255)) {
- debug("\t\trejected brgval=%d\n", *brgval);
- return -1;
- }
-
- brgdiv = 2 * (*brgval + 3 + (2 * filter));
- div = moddiv * brgdiv;
- *totspeed = hz / div;
-
- debug("\t\taccepted brgval=%d, totspeed=%d\n", *brgval, *totspeed);
-
- return 0;
-}
-
-/*
- * Sets the I2C clock predivider and divider to meet required clock speed.
- */
-static int i2c_setrate(int hz, int speed)
-{
- immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
- volatile i2c8xx_t *i2c = (i2c8xx_t *) & immap->im_i2c;
- int brgval,
- modval, /* 0-3 */
- bestspeed_diff = speed,
- bestspeed_brgval = 0,
- bestspeed_modval = 0,
- bestspeed_filter = 0,
- totspeed,
- filter = 0; /* Use this fixed value */
-
- for (modval = 0; modval < 4; modval++) {
- if (i2c_roundrate
- (hz, speed, filter, modval, &brgval, &totspeed) == 0) {
- int diff = speed - totspeed;
-
- if ((diff >= 0) && (diff < bestspeed_diff)) {
- bestspeed_diff = diff;
- bestspeed_modval = modval;
- bestspeed_brgval = brgval;
- bestspeed_filter = filter;
- }
- }
- }
-
- debug("[I2C] Best is:\n");
- debug("[I2C] CPU=%dhz RATE=%d F=%d I2MOD=%08x I2BRG=%08x DIFF=%dhz\n",
- hz,
- speed,
- bestspeed_filter,
- bestspeed_modval,
- bestspeed_brgval,
- bestspeed_diff);
-
- i2c->i2c_i2mod |=
- ((bestspeed_modval & 3) << 1) | (bestspeed_filter << 3);
- i2c->i2c_i2brg = bestspeed_brgval & 0xff;
-
- debug("[I2C] i2mod=%08x i2brg=%08x\n",
- i2c->i2c_i2mod,
- i2c->i2c_i2brg);
-
- return 1;
-}
-
-void i2c_init(int speed, int slaveaddr)
-{
- volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
- volatile cpm8xx_t *cp = (cpm8xx_t *)&immap->im_cpm;
- volatile i2c8xx_t *i2c = (i2c8xx_t *)&immap->im_i2c;
- volatile iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
- ulong rbase, tbase;
- volatile I2C_BD *rxbd, *txbd;
- uint dpaddr;
-
-#ifdef CONFIG_SYS_I2C_INIT_BOARD
- /* call board specific i2c bus reset routine before accessing the */
- /* environment, which might be in a chip on that bus. For details */
- /* about this problem see doc/I2C_Edge_Conditions. */
- i2c_init_board();
-#endif
-
-#ifdef CONFIG_SYS_I2C_UCODE_PATCH
- iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase];
-#else
- /* Disable relocation */
- iip->iic_rpbase = 0;
-#endif
-
- dpaddr = CPM_I2C_BASE;
-
- /*
- * initialise data in dual port ram:
- *
- * dpaddr->rbase -> rx BD (NUM_RX_BDS * sizeof(I2C_BD) bytes)
- * tbase -> tx BD (NUM_TX_BDS * sizeof(I2C_BD) bytes)
- * tx buffer (MAX_TX_SPACE bytes)
- */
-
- rbase = dpaddr;
- tbase = rbase + NUM_RX_BDS * sizeof(I2C_BD);
-
- /* Initialize Port B I2C pins. */
- cp->cp_pbpar |= 0x00000030;
- cp->cp_pbdir |= 0x00000030;
- cp->cp_pbodr |= 0x00000030;
-
- /* Disable interrupts */
- i2c->i2c_i2mod = 0x00;
- i2c->i2c_i2cmr = 0x00;
- i2c->i2c_i2cer = 0xff;
- i2c->i2c_i2add = slaveaddr;
-
- /*
- * Set the I2C BRG Clock division factor from desired i2c rate
- * and current CPU rate (we assume sccr dfbgr field is 0;
- * divide BRGCLK by 1)
- */
- debug("[I2C] Setting rate...\n");
- i2c_setrate(gd->cpu_clk, CONFIG_SYS_I2C_SPEED);
-
- /* Set I2C controller in master mode */
- i2c->i2c_i2com = 0x01;
-
- /* Set SDMA bus arbitration level to 5 (SDCR) */
- immap->im_siu_conf.sc_sdcr = 0x0001;
-
- /* Initialize Tx/Rx parameters */
- iip->iic_rbase = rbase;
- iip->iic_tbase = tbase;
- rxbd = (I2C_BD *) ((unsigned char *) &cp->cp_dpmem[iip->iic_rbase]);
- txbd = (I2C_BD *) ((unsigned char *) &cp->cp_dpmem[iip->iic_tbase]);
-
- debug("[I2C] rbase = %04x\n", iip->iic_rbase);
- debug("[I2C] tbase = %04x\n", iip->iic_tbase);
- debug("[I2C] rxbd = %08x\n", (int)rxbd);
- debug("[I2C] txbd = %08x\n", (int)txbd);
-
- /* Set big endian byte order */
- iip->iic_tfcr = 0x10;
- iip->iic_rfcr = 0x10;
-
- /* Set maximum receive size. */
- iip->iic_mrblr = I2C_RXTX_LEN;
-
-#ifdef CONFIG_SYS_I2C_UCODE_PATCH
- /*
- * Initialize required parameters if using microcode patch.
- */
- iip->iic_rbptr = iip->iic_rbase;
- iip->iic_tbptr = iip->iic_tbase;
- iip->iic_rstate = 0;
- iip->iic_tstate = 0;
-#else
- cp->cp_cpcr = mk_cr_cmd(CPM_CR_CH_I2C, CPM_CR_INIT_TRX) | CPM_CR_FLG;
- do {
- __asm__ __volatile__("eieio");
- } while (cp->cp_cpcr & CPM_CR_FLG);
-#endif
-
- /* Clear events and interrupts */
- i2c->i2c_i2cer = 0xff;
- i2c->i2c_i2cmr = 0x00;
-}
-
-static void i2c_newio(i2c_state_t *state)
-{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
- volatile cpm8xx_t *cp = (cpm8xx_t *)&immap->im_cpm;
- volatile iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
-
- debug("[I2C] i2c_newio\n");
-
-#ifdef CONFIG_SYS_I2C_UCODE_PATCH
- iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase];
-#endif
- state->rx_idx = 0;
- state->tx_idx = 0;
- state->rxbd = (void *)&cp->cp_dpmem[iip->iic_rbase];
- state->txbd = (void *)&cp->cp_dpmem[iip->iic_tbase];
- state->tx_space = MAX_TX_SPACE;
- state->tx_buf = (uchar *)state->txbd + NUM_TX_BDS * sizeof(I2C_BD);
- state->err_cb = NULL;
-
- debug("[I2C] rxbd = %08x\n", (int)state->rxbd);
- debug("[I2C] txbd = %08x\n", (int)state->txbd);
- debug("[I2C] tx_buf = %08x\n", (int)state->tx_buf);
-
- /* clear the buffer memory */
- memset((char *)state->tx_buf, 0, MAX_TX_SPACE);
-}
-
-static int
-i2c_send(i2c_state_t *state,
- unsigned char address,
- unsigned char secondary_address,
- unsigned int flags, unsigned short size, unsigned char *dataout)
-{
- volatile I2C_BD *txbd;
- int i, j;
-
- debug("[I2C] i2c_send add=%02d sec=%02d flag=%02d size=%d\n",
- address, secondary_address, flags, size);
-
- /* trying to send message larger than BD */
- if (size > I2C_RXTX_LEN)
- return I2CERR_MSG_TOO_LONG;
-
- /* no more free bds */
- if (state->tx_idx >= NUM_TX_BDS || state->tx_space < (2 + size))
- return I2CERR_NO_BUFFERS;
-
- txbd = (I2C_BD *) state->txbd;
- txbd->addr = state->tx_buf;
-
- debug("[I2C] txbd = %08x\n", (int)txbd);
-
- if (flags & I2CF_START_COND) {
- debug("[I2C] Formatting addresses...\n");
- if (flags & I2CF_ENABLE_SECONDARY) {
- /* Length of msg + dest addr */
- txbd->length = size + 2;
-
- txbd->addr[0] = address << 1;
- txbd->addr[1] = secondary_address;
- i = 2;
- } else {
- /* Length of msg + dest addr */
- txbd->length = size + 1;
- /* Write dest addr to BD */
- txbd->addr[0] = address << 1;
- i = 1;
- }
- } else {
- txbd->length = size; /* Length of message */
- i = 0;
- }
-
- /* set up txbd */
- txbd->status = BD_SC_READY;
- if (flags & I2CF_START_COND)
- txbd->status |= BD_I2C_TX_START;
- if (flags & I2CF_STOP_COND)
- txbd->status |= BD_SC_LAST | BD_SC_WRAP;
-
- /* Copy data to send into buffer */
- debug("[I2C] copy data...\n");
- for(j = 0; j < size; i++, j++)
- txbd->addr[i] = dataout[j];
-
- debug("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- txbd->length,
- txbd->status,
- txbd->addr[0],
- txbd->addr[1]);
-
- /* advance state */
- state->tx_buf += txbd->length;
- state->tx_space -= txbd->length;
- state->tx_idx++;
- state->txbd = (void *) (txbd + 1);
-
- return 0;
-}
-
-static int
-i2c_receive(i2c_state_t *state,
- unsigned char address,
- unsigned char secondary_address,
- unsigned int flags,
- unsigned short size_to_expect, unsigned char *datain)
-{
- volatile I2C_BD *rxbd, *txbd;
-
- debug("[I2C] i2c_receive %02d %02d %02d\n",
- address, secondary_address, flags);
-
- /* Expected to receive too much */
- if (size_to_expect > I2C_RXTX_LEN)
- return I2CERR_MSG_TOO_LONG;
-
- /* no more free bds */
- if (state->tx_idx >= NUM_TX_BDS || state->rx_idx >= NUM_RX_BDS
- || state->tx_space < 2)
- return I2CERR_NO_BUFFERS;
-
- rxbd = (I2C_BD *) state->rxbd;
- txbd = (I2C_BD *) state->txbd;
-
- debug("[I2C] rxbd = %08x\n", (int)rxbd);
- debug("[I2C] txbd = %08x\n", (int)txbd);
-
- txbd->addr = state->tx_buf;
-
- /* set up TXBD for destination address */
- if (flags & I2CF_ENABLE_SECONDARY) {
- txbd->length = 2;
- txbd->addr[0] = address << 1; /* Write data */
- txbd->addr[1] = secondary_address; /* Internal address */
- txbd->status = BD_SC_READY;
- } else {
- txbd->length = 1 + size_to_expect;
- txbd->addr[0] = (address << 1) | 0x01;
- txbd->status = BD_SC_READY;
- memset(&txbd->addr[1], 0, txbd->length);
- }
-
- /* set up rxbd for reception */
- rxbd->status = BD_SC_EMPTY;
- rxbd->length = size_to_expect;
- rxbd->addr = datain;
-
- txbd->status |= BD_I2C_TX_START;
- if (flags & I2CF_STOP_COND) {
- txbd->status |= BD_SC_LAST | BD_SC_WRAP;
- rxbd->status |= BD_SC_WRAP;
- }
-
- debug("[I2C] txbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- txbd->length,
- txbd->status,
- txbd->addr[0],
- txbd->addr[1]);
- debug("[I2C] rxbd: length=0x%04x status=0x%04x addr[0]=0x%02x addr[1]=0x%02x\n",
- rxbd->length,
- rxbd->status,
- rxbd->addr[0],
- rxbd->addr[1]);
-
- /* advance state */
- state->tx_buf += txbd->length;
- state->tx_space -= txbd->length;
- state->tx_idx++;
- state->txbd = (void *) (txbd + 1);
- state->rx_idx++;
- state->rxbd = (void *) (rxbd + 1);
-
- return 0;
-}
-
-
-static int i2c_doio(i2c_state_t *state)
-{
- volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
- volatile cpm8xx_t *cp = (cpm8xx_t *)&immap->im_cpm;
- volatile i2c8xx_t *i2c = (i2c8xx_t *)&immap->im_i2c;
- volatile iic_t *iip = (iic_t *)&cp->cp_dparam[PROFF_IIC];
- volatile I2C_BD *txbd, *rxbd;
- volatile int j = 0;
-
- debug("[I2C] i2c_doio\n");
-
-#ifdef CONFIG_SYS_I2C_UCODE_PATCH
- iip = (iic_t *)&cp->cp_dpmem[iip->iic_rpbase];
-#endif
-
- if (state->tx_idx <= 0 && state->rx_idx <= 0) {
- debug("[I2C] No I/O is queued\n");
- return I2CERR_QUEUE_EMPTY;
- }
-
- iip->iic_rbptr = iip->iic_rbase;
- iip->iic_tbptr = iip->iic_tbase;
-
- /* Enable I2C */
- debug("[I2C] Enabling I2C...\n");
- i2c->i2c_i2mod |= 0x01;
-
- /* Begin transmission */
- i2c->i2c_i2com |= 0x80;
-
- /* Loop until transmit & receive completed */
-
- if (state->tx_idx > 0) {
- txbd = ((I2C_BD*)state->txbd) - 1;
-
- debug("[I2C] Transmitting...(txbd=0x%08lx)\n",
- (ulong)txbd);
-
- while ((txbd->status & BD_SC_READY) && (j++ < TOUT_LOOP)) {
- if (ctrlc())
- return (-1);
-
- __asm__ __volatile__("eieio");
- }
- }
-
- if ((state->rx_idx > 0) && (j < TOUT_LOOP)) {
- rxbd = ((I2C_BD*)state->rxbd) - 1;
-
- debug("[I2C] Receiving...(rxbd=0x%08lx)\n",
- (ulong)rxbd);
-
- while ((rxbd->status & BD_SC_EMPTY) && (j++ < TOUT_LOOP)) {
- if (ctrlc())
- return (-1);
-
- __asm__ __volatile__("eieio");
- }
- }
-
- /* Turn off I2C */
- i2c->i2c_i2mod &= ~0x01;
-
- if (state->err_cb != NULL) {
- int n, i, b;
-
- /*
- * if we have an error callback function, look at the
- * error bits in the bd status and pass them back
- */
-
- if ((n = state->tx_idx) > 0) {
- for (i = 0; i < n; i++) {
- txbd = ((I2C_BD *) state->txbd) - (n - i);
- if ((b = txbd->status & BD_I2C_TX_ERR) != 0)
- (*state->err_cb) (I2CECB_TX_ERR | b,
- i);
- }
- }
-
- if ((n = state->rx_idx) > 0) {
- for (i = 0; i < n; i++) {
- rxbd = ((I2C_BD *) state->rxbd) - (n - i);
- if ((b = rxbd->status & BD_I2C_RX_ERR) != 0)
- (*state->err_cb) (I2CECB_RX_ERR | b,
- i);
- }
- }
-
- if (j >= TOUT_LOOP)
- (*state->err_cb) (I2CECB_TIMEOUT, 0);
- }
-
- return (j >= TOUT_LOOP) ? I2CERR_TIMEOUT : 0;
-}
-
-static int had_tx_nak;
-
-static void i2c_test_callback(int flags, int xnum)
-{
- if ((flags & I2CECB_TX_ERR) && (flags & I2CECB_TX_NAK))
- had_tx_nak = 1;
-}
-
-int i2c_probe(uchar chip)
-{
- i2c_state_t state;
- int rc;
- uchar buf[1];
-
- i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
-
- i2c_newio(&state);
-
- state.err_cb = i2c_test_callback;
- had_tx_nak = 0;
-
- rc = i2c_receive(&state, chip, 0, I2CF_START_COND | I2CF_STOP_COND, 1,
- buf);
-
- if (rc != 0)
- return (rc);
-
- rc = i2c_doio(&state);
-
- if ((rc != 0) && (rc != I2CERR_TIMEOUT))
- return (rc);
-
- return (had_tx_nak);
-}
-
-int i2c_read(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
- i2c_state_t state;
- uchar xaddr[4];
- int rc;
-
- xaddr[0] = (addr >> 24) & 0xFF;
- xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
-
-#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
- /*
- * EEPROM chips that implement "address overflow" are ones like
- * Catalyst 24WC04/08/16 which has 9/10/11 bits of address and the
- * extra bits end up in the "chip address" bit slots. This makes
- * a 24WC08 (1Kbyte) chip look like four 256 byte chips.
- *
- * Note that we consider the length of the address field to still
- * be one byte because the extra address bits are hidden in the
- * chip address.
- */
- chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
-#endif
-
- i2c_newio(&state);
-
- rc = i2c_send(&state, chip, 0, I2CF_START_COND, alen,
- &xaddr[4 - alen]);
- if (rc != 0) {
- printf("i2c_read: i2c_send failed (%d)\n", rc);
- return 1;
- }
-
- rc = i2c_receive(&state, chip, 0, I2CF_STOP_COND, len, buffer);
- if (rc != 0) {
- printf("i2c_read: i2c_receive failed (%d)\n", rc);
- return 1;
- }
-
- rc = i2c_doio(&state);
- if (rc != 0) {
- printf("i2c_read: i2c_doio failed (%d)\n", rc);
- return 1;
- }
- return 0;
-}
-
-int i2c_write(uchar chip, uint addr, int alen, uchar *buffer, int len)
-{
- i2c_state_t state;
- uchar xaddr[4];
- int rc;
-
- xaddr[0] = (addr >> 24) & 0xFF;
- xaddr[1] = (addr >> 16) & 0xFF;
- xaddr[2] = (addr >> 8) & 0xFF;
- xaddr[3] = addr & 0xFF;
-
-#ifdef CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW
- /*
- * EEPROM chips that implement "address overflow" are ones like
- * Catalyst 24WC04/08/16 which has 9/10/11 bits of address and the
- * extra bits end up in the "chip address" bit slots. This makes
- * a 24WC08 (1Kbyte) chip look like four 256 byte chips.
- *
- * Note that we consider the length of the address field to still
- * be one byte because the extra address bits are hidden in the
- * chip address.
- */
- chip |= ((addr >> (alen * 8)) & CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW);
-#endif
-
- i2c_newio(&state);
-
- rc = i2c_send(&state, chip, 0, I2CF_START_COND, alen,
- &xaddr[4 - alen]);
- if (rc != 0) {
- printf("i2c_write: first i2c_send failed (%d)\n", rc);
- return 1;
- }
-
- rc = i2c_send(&state, 0, 0, I2CF_STOP_COND, len, buffer);
- if (rc != 0) {
- printf("i2c_write: second i2c_send failed (%d)\n", rc);
- return 1;
- }
-
- rc = i2c_doio(&state);
- if (rc != 0) {
- printf("i2c_write: i2c_doio failed (%d)\n", rc);
- return 1;
- }
- return 0;
-}
-
-#endif /* CONFIG_HARD_I2C */
CONFIG_MCFPIT -- define to use PIT timer
CONFIG_SYS_I2C_FSL -- define to use FSL common I2C driver
-CONFIG_HARD_I2C -- define for I2C hardware support
CONFIG_SYS_I2C_SOFT -- define for I2C bit-banged
CONFIG_SYS_I2C_SPEED -- define for I2C speed
CONFIG_SYS_I2C_SLAVE -- define for I2C slave address
CONFIG_MCFPIT -- define to use PIT timer
CONFIG_SYS_I2C_FSL -- define to use FSL common I2C driver
-CONFIG_HARD_I2C -- define for I2C hardware support
CONFIG_SYS_I2C_SOFT -- define for I2C bit-banged
CONFIG_SYS_I2C_SPEED -- define for I2C speed
CONFIG_SYS_I2C_SLAVE -- define for I2C slave address
CONFIG_MCFPIT -- define to use PIT timer
CONFIG_SYS_I2C_FSL -- define to use FSL common I2C driver
-CONFIG_HARD_I2C -- define for I2C hardware support
CONFIG_SYS_I2C_SOFT -- define for I2C bit-banged
CONFIG_SYS_I2C_SPEED -- define for I2C speed
CONFIG_SYS_I2C_SLAVE -- define for I2C slave address
CONFIG_MCFPIT -- define to use PIT timer
CONFIG_SYS_FSL_I2C -- define to use FSL common I2C driver
-CONFIG_HARD_I2C -- define for I2C hardware support
CONFIG_SYS_I2C_SOFT -- define for I2C bit-banged
CONFIG_SYS_I2C_SPEED -- define for I2C speed
CONFIG_SYS_I2C_SLAVE -- define for I2C slave address
CONFIG_SLTTMR -- define to use SLT timer
CONFIG_SYS_I2C_FSL -- define to use FSL common I2C driver
-CONFIG_HARD_I2C -- define for I2C hardware support
CONFIG_SYS_I2C_SOFT -- define for I2C bit-banged
CONFIG_SYS_I2C_SPEED -- define for I2C speed
CONFIG_SYS_I2C_SLAVE -- define for I2C slave address
projects / u-boot.git / commitdiff