+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Sunxi A31 Power Management Unit
- *
- * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
- * http://linux-sunxi.org
- *
- * Based on sun6i sources and earlier U-Boot Allwinner A10 SPL work
- *
- * (C) Copyright 2006-2013
- * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
- * Berg Xing <bergxing@allwinnertech.com>
- * Tom Cubie <tangliang@allwinnertech.com>
- */
-
-#include <common.h>
-#include <errno.h>
-#include <time.h>
-#include <asm/io.h>
-#include <asm/arch/cpu.h>
-#include <asm/arch/gpio.h>
-#include <asm/arch/p2wi.h>
-#include <asm/arch/prcm.h>
-#include <asm/arch/clock.h>
-#include <asm/arch/sys_proto.h>
-
-void p2wi_init(void)
-{
- struct sunxi_p2wi_reg *p2wi = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
-
- /* Enable p2wi and PIO clk, and de-assert their resets */
- prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_P2WI);
-
- sunxi_gpio_set_cfgpin(SUNXI_GPL(0), SUN6I_GPL0_R_P2WI_SCK);
- sunxi_gpio_set_cfgpin(SUNXI_GPL(1), SUN6I_GPL1_R_P2WI_SDA);
-
- /* Reset p2wi controller and set clock to CLKIN(12)/8 = 1.5 MHz */
- writel(P2WI_CTRL_RESET, &p2wi->ctrl);
- sdelay(0x100);
- writel(P2WI_CC_SDA_OUT_DELAY(1) | P2WI_CC_CLK_DIV(8),
- &p2wi->cc);
-}
-
-int p2wi_change_to_p2wi_mode(u8 slave_addr, u8 ctrl_reg, u8 init_data)
-{
- struct sunxi_p2wi_reg *p2wi = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
- unsigned long tmo = timer_get_us() + 1000000;
-
- writel(P2WI_PM_DEV_ADDR(slave_addr) |
- P2WI_PM_CTRL_ADDR(ctrl_reg) |
- P2WI_PM_INIT_DATA(init_data) |
- P2WI_PM_INIT_SEND,
- &p2wi->pm);
-
- while ((readl(&p2wi->pm) & P2WI_PM_INIT_SEND)) {
- if (timer_get_us() > tmo)
- return -ETIME;
- }
-
- return 0;
-}
-
-static int p2wi_await_trans(void)
-{
- struct sunxi_p2wi_reg *p2wi = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
- unsigned long tmo = timer_get_us() + 1000000;
- int ret;
- u8 reg;
-
- while (1) {
- reg = readl(&p2wi->status);
- if (reg & P2WI_STAT_TRANS_ERR) {
- ret = -EIO;
- break;
- }
- if (reg & P2WI_STAT_TRANS_DONE) {
- ret = 0;
- break;
- }
- if (timer_get_us() > tmo) {
- ret = -ETIME;
- break;
- }
- }
- writel(reg, &p2wi->status); /* Clear status bits */
- return ret;
-}
-
-int p2wi_read(const u8 addr, u8 *data)
-{
- struct sunxi_p2wi_reg *p2wi = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
- int ret;
-
- writel(P2WI_DATADDR_BYTE_1(addr), &p2wi->dataddr0);
- writel(P2WI_DATA_NUM_BYTES(1) |
- P2WI_DATA_NUM_BYTES_READ, &p2wi->numbytes);
- writel(P2WI_STAT_TRANS_DONE, &p2wi->status);
- writel(P2WI_CTRL_TRANS_START, &p2wi->ctrl);
-
- ret = p2wi_await_trans();
-
- *data = readl(&p2wi->data0) & P2WI_DATA_BYTE_1_MASK;
- return ret;
-}
-
-int p2wi_write(const u8 addr, u8 data)
-{
- struct sunxi_p2wi_reg *p2wi = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
-
- writel(P2WI_DATADDR_BYTE_1(addr), &p2wi->dataddr0);
- writel(P2WI_DATA_BYTE_1(data), &p2wi->data0);
- writel(P2WI_DATA_NUM_BYTES(1), &p2wi->numbytes);
- writel(P2WI_STAT_TRANS_DONE, &p2wi->status);
- writel(P2WI_CTRL_TRANS_START, &p2wi->ctrl);
-
- return p2wi_await_trans();
-}
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Sunxi A31 Power Management Unit
+ *
+ * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
+ * http://linux-sunxi.org
+ *
+ * Based on sun6i sources and earlier U-Boot Allwinner A10 SPL work
+ *
+ * (C) Copyright 2006-2013
+ * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
+ * Berg Xing <bergxing@allwinnertech.com>
+ * Tom Cubie <tangliang@allwinnertech.com>
+ */
+
+#include <axp_pmic.h>
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <i2c.h>
+#include <time.h>
+#include <asm/io.h>
+#include <asm/arch/cpu.h>
+#include <asm/arch/gpio.h>
+#include <asm/arch/p2wi.h>
+#include <asm/arch/prcm.h>
+#include <asm/arch/sys_proto.h>
+
+static int sun6i_p2wi_await_trans(struct sunxi_p2wi_reg *base)
+{
+ unsigned long tmo = timer_get_us() + 1000000;
+ int ret;
+ u8 reg;
+
+ while (1) {
+ reg = readl(&base->status);
+ if (reg & P2WI_STAT_TRANS_ERR) {
+ ret = -EIO;
+ break;
+ }
+ if (reg & P2WI_STAT_TRANS_DONE) {
+ ret = 0;
+ break;
+ }
+ if (timer_get_us() > tmo) {
+ ret = -ETIME;
+ break;
+ }
+ }
+ writel(reg, &base->status); /* Clear status bits */
+
+ return ret;
+}
+
+static int sun6i_p2wi_read(struct sunxi_p2wi_reg *base, const u8 addr, u8 *data)
+{
+ int ret;
+
+ writel(P2WI_DATADDR_BYTE_1(addr), &base->dataddr0);
+ writel(P2WI_DATA_NUM_BYTES(1) |
+ P2WI_DATA_NUM_BYTES_READ, &base->numbytes);
+ writel(P2WI_STAT_TRANS_DONE, &base->status);
+ writel(P2WI_CTRL_TRANS_START, &base->ctrl);
+
+ ret = sun6i_p2wi_await_trans(base);
+
+ *data = readl(&base->data0) & P2WI_DATA_BYTE_1_MASK;
+
+ return ret;
+}
+
+static int sun6i_p2wi_write(struct sunxi_p2wi_reg *base, const u8 addr, u8 data)
+{
+ writel(P2WI_DATADDR_BYTE_1(addr), &base->dataddr0);
+ writel(P2WI_DATA_BYTE_1(data), &base->data0);
+ writel(P2WI_DATA_NUM_BYTES(1), &base->numbytes);
+ writel(P2WI_STAT_TRANS_DONE, &base->status);
+ writel(P2WI_CTRL_TRANS_START, &base->ctrl);
+
+ return sun6i_p2wi_await_trans(base);
+}
+
+static int sun6i_p2wi_change_to_p2wi_mode(struct sunxi_p2wi_reg *base,
+ u8 slave_addr, u8 ctrl_reg,
+ u8 init_data)
+{
+ unsigned long tmo = timer_get_us() + 1000000;
+
+ writel(P2WI_PM_DEV_ADDR(slave_addr) |
+ P2WI_PM_CTRL_ADDR(ctrl_reg) |
+ P2WI_PM_INIT_DATA(init_data) |
+ P2WI_PM_INIT_SEND,
+ &base->pm);
+
+ while ((readl(&base->pm) & P2WI_PM_INIT_SEND)) {
+ if (timer_get_us() > tmo)
+ return -ETIME;
+ }
+
+ return 0;
+}
+
+static void sun6i_p2wi_init(struct sunxi_p2wi_reg *base)
+{
+ /* Enable p2wi and PIO clk, and de-assert their resets */
+ prcm_apb0_enable(PRCM_APB0_GATE_PIO | PRCM_APB0_GATE_P2WI);
+
+ sunxi_gpio_set_cfgpin(SUNXI_GPL(0), SUN6I_GPL0_R_P2WI_SCK);
+ sunxi_gpio_set_cfgpin(SUNXI_GPL(1), SUN6I_GPL1_R_P2WI_SDA);
+
+ /* Reset p2wi controller and set clock to CLKIN(12)/8 = 1.5 MHz */
+ writel(P2WI_CTRL_RESET, &base->ctrl);
+ sdelay(0x100);
+ writel(P2WI_CC_SDA_OUT_DELAY(1) | P2WI_CC_CLK_DIV(8),
+ &base->cc);
+}
+
+#if IS_ENABLED(CONFIG_AXP_PMIC_BUS)
+int p2wi_read(const u8 addr, u8 *data)
+{
+ struct sunxi_p2wi_reg *base = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
+
+ return sun6i_p2wi_read(base, addr, data);
+}
+
+int p2wi_write(const u8 addr, u8 data)
+{
+ struct sunxi_p2wi_reg *base = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
+
+ return sun6i_p2wi_write(base, addr, data);
+}
+
+int p2wi_change_to_p2wi_mode(u8 slave_addr, u8 ctrl_reg, u8 init_data)
+{
+ struct sunxi_p2wi_reg *base = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
+
+ return sun6i_p2wi_change_to_p2wi_mode(base, slave_addr, ctrl_reg,
+ init_data);
+}
+
+void p2wi_init(void)
+{
+ struct sunxi_p2wi_reg *base = (struct sunxi_p2wi_reg *)SUN6I_P2WI_BASE;
+
+ sun6i_p2wi_init(base);
+}
+#endif
+
+#if CONFIG_IS_ENABLED(DM_I2C)
+struct sun6i_p2wi_priv {
+ struct sunxi_p2wi_reg *base;
+};
+
+static int sun6i_p2wi_xfer(struct udevice *bus, struct i2c_msg *msg, int nmsgs)
+{
+ struct sun6i_p2wi_priv *priv = dev_get_priv(bus);
+
+ /* The hardware only supports SMBus-style transfers. */
+ if (nmsgs == 2 && msg[1].flags == I2C_M_RD && msg[1].len == 1)
+ return sun6i_p2wi_read(priv->base,
+ msg[0].buf[0], &msg[1].buf[0]);
+
+ if (nmsgs == 1 && msg[0].len == 2)
+ return sun6i_p2wi_write(priv->base,
+ msg[0].buf[0], msg[0].buf[1]);
+
+ return -EINVAL;
+}
+
+static int sun6i_p2wi_probe_chip(struct udevice *bus, uint chip_addr,
+ uint chip_flags)
+{
+ struct sun6i_p2wi_priv *priv = dev_get_priv(bus);
+
+ return sun6i_p2wi_change_to_p2wi_mode(priv->base, chip_addr,
+ AXP_PMIC_MODE_REG,
+ AXP_PMIC_MODE_P2WI);
+}
+
+static int sun6i_p2wi_probe(struct udevice *bus)
+{
+ struct sun6i_p2wi_priv *priv = dev_get_priv(bus);
+
+ priv->base = dev_read_addr_ptr(bus);
+
+ sun6i_p2wi_init(priv->base);
+
+ return 0;
+}
+
+static int sun6i_p2wi_child_pre_probe(struct udevice *child)
+{
+ struct dm_i2c_chip *chip = dev_get_parent_plat(child);
+
+ /* Ensure each transfer is for a single register. */
+ chip->flags |= DM_I2C_CHIP_RD_ADDRESS | DM_I2C_CHIP_WR_ADDRESS;
+
+ return 0;
+}
+
+static const struct dm_i2c_ops sun6i_p2wi_ops = {
+ .xfer = sun6i_p2wi_xfer,
+ .probe_chip = sun6i_p2wi_probe_chip,
+};
+
+static const struct udevice_id sun6i_p2wi_ids[] = {
+ { .compatible = "allwinner,sun6i-a31-p2wi" },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(sun6i_p2wi) = {
+ .name = "sun6i_p2wi",
+ .id = UCLASS_I2C,
+ .of_match = sun6i_p2wi_ids,
+ .probe = sun6i_p2wi_probe,
+ .child_pre_probe = sun6i_p2wi_child_pre_probe,
+ .priv_auto = sizeof(struct sun6i_p2wi_priv),
+ .ops = &sun6i_p2wi_ops,
+};
+#endif /* CONFIG_IS_ENABLED(DM_I2C) */
projects / u-boot.git / commitdiff
