Blackfin: bfin_spi: convert to portmux framework

Rather than bang MMRs directly, use the new portmux framework to handle
the details.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

diff --git a/drivers/spi/bfin_spi.c b/drivers/spi/bfin_spi.c
index f28d42b4893d5a30499af9e3ffc821eee03e3877..4e008a79b6ad79e57242b407a9ce0e3d1bbd6a18 100644 (file)
--- a/drivers/spi/bfin_spi.c
+++ b/drivers/spi/bfin_spi.c
@@ -13,6 +13,7 @@
 #include <spi.h>
 
 #include <asm/blackfin.h>
+#include <asm/portmux.h>
 #include <asm/mach-common/bits/spi.h>
 
 struct bfin_spi_slave {
@@ -81,6 +82,42 @@ void spi_init()
 {
 }
 
+#ifdef SPI_CTL
+# define SPI0_CTL SPI_CTL
+#endif
+
+#define SPI_PINS(n) \
+       [n] = { 0, P_SPI##n##_SCK, P_SPI##n##_MISO, P_SPI##n##_MOSI, 0 }
+static unsigned short pins[][5] = {
+#ifdef SPI0_CTL
+       SPI_PINS(0),
+#endif
+#ifdef SPI1_CTL
+       SPI_PINS(1),
+#endif
+#ifdef SPI2_CTL
+       SPI_PINS(2),
+#endif
+};
+
+#define SPI_CS_PINS(n) \
+       [n] = { \
+               P_SPI##n##_SSEL1, P_SPI##n##_SSEL2, P_SPI##n##_SSEL3, \
+               P_SPI##n##_SSEL4, P_SPI##n##_SSEL5, P_SPI##n##_SSEL6, \
+               P_SPI##n##_SSEL7, \
+       }
+static const unsigned short cs_pins[][7] = {
+#ifdef SPI0_CTL
+       SPI_CS_PINS(0),
+#endif
+#ifdef SPI1_CTL
+       SPI_CS_PINS(1),
+#endif
+#ifdef SPI2_CTL
+       SPI_CS_PINS(2),
+#endif
+};
+
 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
                unsigned int max_hz, unsigned int mode)
 {
@@ -92,11 +129,14 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
        if (!spi_cs_is_valid(bus, cs))
                return NULL;
 
+       if (bus >= ARRAY_SIZE(pins) || pins[bus] == NULL) {
+               debug("%s: invalid bus %u\n", __func__, bus);
+               return NULL;
+       }
        switch (bus) {
-#ifdef SPI_CTL
-# define SPI0_CTL SPI_CTL
-#endif
+#ifdef SPI0_CTL
                case 0: mmr_base = SPI0_CTL; break;
+#endif
 #ifdef SPI1_CTL
                case 1: mmr_base = SPI1_CTL; break;
 #endif
@@ -142,168 +182,15 @@ void spi_free_slave(struct spi_slave *slave)
        free(bss);
 }
 
-static void spi_portmux(struct spi_slave *slave)
-{
-#if defined(__ADSPBF51x__)
-#define SET_MUX(port, mux, func) port##_mux = ((port##_mux & ~PORT_x_MUX_##mux##_MASK) | PORT_x_MUX_##mux##_FUNC_##func)
-       u16 f_mux = bfin_read_PORTF_MUX();
-       u16 f_fer = bfin_read_PORTF_FER();
-       u16 g_mux = bfin_read_PORTG_MUX();
-       u16 g_fer = bfin_read_PORTG_FER();
-       u16 h_mux = bfin_read_PORTH_MUX();
-       u16 h_fer = bfin_read_PORTH_FER();
-       switch (slave->bus) {
-       case 0:
-               /* set SCK/MISO/MOSI */
-               SET_MUX(g, 7, 1);
-               g_fer |= PG12 | PG13 | PG14;
-               switch (slave->cs) {
-                       case 1: SET_MUX(f, 2, 1); f_fer |= PF7;  break;
-                       case 2: /* see G above */ g_fer |= PG15; break;
-                       case 3: SET_MUX(h, 1, 3); f_fer |= PH4;  break;
-                       case 4: /* no muxing */   h_fer |= PH8;  break;
-                       case 5: SET_MUX(g, 1, 3); h_fer |= PG3;  break;
-                       case 6: /* no muxing */                  break;
-                       case 7: /* no muxing */                  break;
-               }
-       case 1:
-               /* set SCK/MISO/MOSI */
-               SET_MUX(h, 0, 2);
-               h_fer |= PH1 | PH2 | PH3;
-               switch (slave->cs) {
-                       case 1: SET_MUX(h, 2, 3); h_fer |= PH6;  break;
-                       case 2: SET_MUX(f, 0, 3); f_fer |= PF0;  break;
-                       case 3: SET_MUX(g, 0, 3); g_fer |= PG0;  break;
-                       case 4: SET_MUX(f, 3, 3); f_fer |= PF8;  break;
-                       case 5: SET_MUX(g, 6, 3); h_fer |= PG11; break;
-                       case 6: /* no muxing */                  break;
-                       case 7: /* no muxing */                  break;
-               }
-       }
-       bfin_write_PORTF_MUX(f_mux);
-       bfin_write_PORTF_FER(f_fer);
-       bfin_write_PORTG_MUX(g_mux);
-       bfin_write_PORTG_FER(g_fer);
-       bfin_write_PORTH_MUX(h_mux);
-       bfin_write_PORTH_FER(h_fer);
-#elif defined(__ADSPBF52x__)
-#define SET_MUX(port, mux, func) port##_mux = ((port##_mux & ~PORT_x_MUX_##mux##_MASK) | PORT_x_MUX_##mux##_FUNC_##func)
-       u16 f_mux = bfin_read_PORTF_MUX();
-       u16 f_fer = bfin_read_PORTF_FER();
-       u16 g_mux = bfin_read_PORTG_MUX();
-       u16 g_fer = bfin_read_PORTG_FER();
-       u16 h_mux = bfin_read_PORTH_MUX();
-       u16 h_fer = bfin_read_PORTH_FER();
-       /* set SCK/MISO/MOSI */
-       SET_MUX(g, 0, 3);
-       g_fer |= PG2 | PG3 | PG4;
-       switch (slave->cs) {
-               case 1: /* see G above */ g_fer |= PG1;  break;
-               case 2: SET_MUX(f, 4, 3); f_fer |= PF12; break;
-               case 3: SET_MUX(f, 4, 3); f_fer |= PF13; break;
-               case 4: SET_MUX(h, 1, 1); h_fer |= PH8;  break;
-               case 5: SET_MUX(h, 2, 1); h_fer |= PH9;  break;
-               case 6: SET_MUX(f, 1, 3); f_fer |= PF9;  break;
-               case 7: SET_MUX(f, 2, 3); f_fer |= PF10; break;
-       }
-       bfin_write_PORTF_MUX(f_mux);
-       bfin_write_PORTF_FER(f_fer);
-       bfin_write_PORTG_MUX(g_mux);
-       bfin_write_PORTG_FER(g_fer);
-       bfin_write_PORTH_MUX(h_mux);
-       bfin_write_PORTH_FER(h_fer);
-#elif defined(__ADSPBF534__) || defined(__ADSPBF536__) || defined(__ADSPBF537__)
-       u16 mux = bfin_read_PORT_MUX();
-       u16 f_fer = bfin_read_PORTF_FER();
-       /* set SCK/MISO/MOSI */
-       f_fer |= PF11 | PF12 | PF13;
-       switch (slave->cs) {
-               case 1: f_fer |= PF10; break;
-               case 2: mux |= PJSE; break;
-               case 3: mux |= PJSE; break;
-               case 4: mux |= PFS4E; f_fer |= PF6; break;
-               case 5: mux |= PFS5E; f_fer |= PF5; break;
-               case 6: mux |= PFS6E; f_fer |= PF4; break;
-               case 7: mux |= PJCE_SPI; break;
-       }
-       bfin_write_PORT_MUX(mux);
-       bfin_write_PORTF_FER(f_fer);
-#elif defined(__ADSPBF538__) || defined(__ADSPBF539__)
-       u16 fer, pins;
-       if (slave->bus == 1)
-               pins = PD0 | PD1 | PD2 | (slave->cs == 1 ? PD4 : 0);
-       else if (slave->bus == 2)
-               pins = PD5 | PD6 | PD7 | (slave->cs == 1 ? PD9 : 0);
-       else
-               pins = 0;
-       if (pins) {
-               fer = bfin_read_PORTDIO_FER();
-               fer &= ~pins;
-               bfin_write_PORTDIO_FER(fer);
-       }
-#elif defined(__ADSPBF54x__)
-#define DO_MUX(port, pin) \
-       mux = ((mux & ~PORT_x_MUX_##pin##_MASK) | PORT_x_MUX_##pin##_FUNC_1); \
-       fer |= P##port##pin;
-       u32 mux;
-       u16 fer;
-       switch (slave->bus) {
-       case 0:
-               mux = bfin_read_PORTE_MUX();
-               fer = bfin_read_PORTE_FER();
-               /* set SCK/MISO/MOSI */
-               DO_MUX(E, 0);
-               DO_MUX(E, 1);
-               DO_MUX(E, 2);
-               switch (slave->cs) {
-                       case 1: DO_MUX(E, 4); break;
-                       case 2: DO_MUX(E, 5); break;
-                       case 3: DO_MUX(E, 6); break;
-               }
-               bfin_write_PORTE_MUX(mux);
-               bfin_write_PORTE_FER(fer);
-               break;
-       case 1:
-               mux = bfin_read_PORTG_MUX();
-               fer = bfin_read_PORTG_FER();
-               /* set SCK/MISO/MOSI */
-               DO_MUX(G, 8);
-               DO_MUX(G, 9);
-               DO_MUX(G, 10);
-               switch (slave->cs) {
-                       case 1: DO_MUX(G, 5); break;
-                       case 2: DO_MUX(G, 6); break;
-                       case 3: DO_MUX(G, 7); break;
-               }
-               bfin_write_PORTG_MUX(mux);
-               bfin_write_PORTG_FER(fer);
-               break;
-       case 2:
-               mux = bfin_read_PORTB_MUX();
-               fer = bfin_read_PORTB_FER();
-               /* set SCK/MISO/MOSI */
-               DO_MUX(B, 12);
-               DO_MUX(B, 13);
-               DO_MUX(B, 14);
-               switch (slave->cs) {
-                       case 1: DO_MUX(B, 9);  break;
-                       case 2: DO_MUX(B, 10); break;
-                       case 3: DO_MUX(B, 11); break;
-               }
-               bfin_write_PORTB_MUX(mux);
-               bfin_write_PORTB_FER(fer);
-               break;
-       }
-#endif
-}
-
 int spi_claim_bus(struct spi_slave *slave)
 {
        struct bfin_spi_slave *bss = to_bfin_spi_slave(slave);
 
        debug("%s: bus:%i cs:%i\n", __func__, slave->bus, slave->cs);
 
-       spi_portmux(slave);
+       pins[slave->bus][0] = cs_pins[slave->bus][slave->cs - 1];
+       peripheral_request_list(pins[slave->bus], "bfin-spi");
+
        write_SPI_CTL(bss, bss->ctl);
        write_SPI_BAUD(bss, bss->baud);
        SSYNC();
@@ -314,7 +201,11 @@ int spi_claim_bus(struct spi_slave *slave)
 void spi_release_bus(struct spi_slave *slave)
 {
        struct bfin_spi_slave *bss = to_bfin_spi_slave(slave);
+
        debug("%s: bus:%i cs:%i\n", __func__, slave->bus, slave->cs);
+
+       peripheral_free_list(pins[slave->bus]);
+
        write_SPI_CTL(bss, 0);
        SSYNC();
 }