ARM: 6020/1: ST SPEAr: Adding gpio pad multiplexing support

GPIO Pads in spear platform are are multiplexed in various machines.
This patch adds support for this pad multiplexing.

Reviewed-by: Linus Walleij <linux.walleij@stericsson.com>
Signed-off-by: Viresh Kumar <viresh.kumar@st.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 358 insertions, 0 deletions

diff --git a/arch/arm/mach-spear3xx/spear300.c b/arch/arm/mach-spear3xx/spear300.c
index 63aca8fc3ebb..66e7fcd8baf8 100644
--- a/arch/arm/mach-spear3xx/spear300.c
+++ b/arch/arm/mach-spear3xx/spear300.c
@@ -18,6 +18,357 @@
 #include <mach/generic.h>
 #include <mach/spear.h>
 
+/* pad multiplexing support */
+/* muxing registers */
+#define PAD_MUX_CONFIG_REG      0x00
+#define MODE_CONFIG_REG         0x04
+
+/* modes */
+#define NAND_MODE                       (1 << 0)
+#define NOR_MODE                        (1 << 1)
+#define PHOTO_FRAME_MODE                (1 << 2)
+#define LEND_IP_PHONE_MODE              (1 << 3)
+#define HEND_IP_PHONE_MODE              (1 << 4)
+#define LEND_WIFI_PHONE_MODE            (1 << 5)
+#define HEND_WIFI_PHONE_MODE            (1 << 6)
+#define ATA_PABX_WI2S_MODE              (1 << 7)
+#define ATA_PABX_I2S_MODE               (1 << 8)
+#define CAML_LCDW_MODE                  (1 << 9)
+#define CAMU_LCD_MODE                   (1 << 10)
+#define CAMU_WLCD_MODE                  (1 << 11)
+#define CAML_LCD_MODE                   (1 << 12)
+#define ALL_MODES                       0x1FFF
+
+struct pmx_mode nand_mode = {
+        .id = NAND_MODE,
+        .name = "nand mode",
+        .mask = 0x00,
+};
+
+struct pmx_mode nor_mode = {
+        .id = NOR_MODE,
+        .name = "nor mode",
+        .mask = 0x01,
+};
+
+struct pmx_mode photo_frame_mode = {
+        .id = PHOTO_FRAME_MODE,
+        .name = "photo frame mode",
+        .mask = 0x02,
+};
+
+struct pmx_mode lend_ip_phone_mode = {
+        .id = LEND_IP_PHONE_MODE,
+        .name = "lend ip phone mode",
+        .mask = 0x03,
+};
+
+struct pmx_mode hend_ip_phone_mode = {
+        .id = HEND_IP_PHONE_MODE,
+        .name = "hend ip phone mode",
+        .mask = 0x04,
+};
+
+struct pmx_mode lend_wifi_phone_mode = {
+        .id = LEND_WIFI_PHONE_MODE,
+        .name = "lend wifi phone mode",
+        .mask = 0x05,
+};
+
+struct pmx_mode hend_wifi_phone_mode = {
+        .id = HEND_WIFI_PHONE_MODE,
+        .name = "hend wifi phone mode",
+        .mask = 0x06,
+};
+
+struct pmx_mode ata_pabx_wi2s_mode = {
+        .id = ATA_PABX_WI2S_MODE,
+        .name = "ata pabx wi2s mode",
+        .mask = 0x07,
+};
+
+struct pmx_mode ata_pabx_i2s_mode = {
+        .id = ATA_PABX_I2S_MODE,
+        .name = "ata pabx i2s mode",
+        .mask = 0x08,
+};
+
+struct pmx_mode caml_lcdw_mode = {
+        .id = CAML_LCDW_MODE,
+        .name = "caml lcdw mode",
+        .mask = 0x0C,
+};
+
+struct pmx_mode camu_lcd_mode = {
+        .id = CAMU_LCD_MODE,
+        .name = "camu lcd mode",
+        .mask = 0x0D,
+};
+
+struct pmx_mode camu_wlcd_mode = {
+        .id = CAMU_WLCD_MODE,
+        .name = "camu wlcd mode",
+        .mask = 0x0E,
+};
+
+struct pmx_mode caml_lcd_mode = {
+        .id = CAML_LCD_MODE,
+        .name = "caml lcd mode",
+        .mask = 0x0F,
+};
+
+/* devices */
+struct pmx_dev_mode pmx_fsmc_2_chips_modes[] = {
+        {
+                .ids = NAND_MODE | NOR_MODE | PHOTO_FRAME_MODE |
+                        ATA_PABX_WI2S_MODE | ATA_PABX_I2S_MODE,
+                .mask = PMX_FIRDA_MASK,
+        },
+};
+
+struct pmx_dev pmx_fsmc_2_chips = {
+        .name = "fsmc_2_chips",
+        .modes = pmx_fsmc_2_chips_modes,
+        .mode_count = ARRAY_SIZE(pmx_fsmc_2_chips_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_fsmc_4_chips_modes[] = {
+        {
+                .ids = NAND_MODE | NOR_MODE | PHOTO_FRAME_MODE |
+                        ATA_PABX_WI2S_MODE | ATA_PABX_I2S_MODE,
+                .mask = PMX_FIRDA_MASK | PMX_UART0_MASK,
+        },
+};
+
+struct pmx_dev pmx_fsmc_4_chips = {
+        .name = "fsmc_4_chips",
+        .modes = pmx_fsmc_4_chips_modes,
+        .mode_count = ARRAY_SIZE(pmx_fsmc_4_chips_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_keyboard_modes[] = {
+        {
+                .ids = LEND_IP_PHONE_MODE | HEND_IP_PHONE_MODE |
+                        LEND_WIFI_PHONE_MODE | HEND_WIFI_PHONE_MODE |
+                        CAML_LCDW_MODE | CAMU_LCD_MODE | CAMU_WLCD_MODE |
+                        CAML_LCD_MODE,
+                .mask = 0x0,
+        },
+};
+
+struct pmx_dev pmx_keyboard = {
+        .name = "keyboard",
+        .modes = pmx_keyboard_modes,
+        .mode_count = ARRAY_SIZE(pmx_keyboard_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_clcd_modes[] = {
+        {
+                .ids = PHOTO_FRAME_MODE,
+                .mask = PMX_TIMER_1_2_MASK | PMX_TIMER_3_4_MASK ,
+        }, {
+                .ids = HEND_IP_PHONE_MODE | HEND_WIFI_PHONE_MODE |
+                        CAMU_LCD_MODE | CAML_LCD_MODE,
+                .mask = PMX_TIMER_3_4_MASK,
+        },
+};
+
+struct pmx_dev pmx_clcd = {
+        .name = "clcd",
+        .modes = pmx_clcd_modes,
+        .mode_count = ARRAY_SIZE(pmx_clcd_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_gpio_modes[] = {
+        {
+                .ids = PHOTO_FRAME_MODE | CAMU_LCD_MODE | CAML_LCD_MODE,
+                .mask = PMX_MII_MASK,
+        }, {
+                .ids = LEND_IP_PHONE_MODE | LEND_WIFI_PHONE_MODE,
+                .mask = PMX_MII_MASK | PMX_TIMER_1_2_MASK | PMX_TIMER_3_4_MASK,
+        }, {
+                .ids = ATA_PABX_I2S_MODE | CAML_LCDW_MODE | CAMU_WLCD_MODE,
+                .mask = PMX_MII_MASK | PMX_TIMER_3_4_MASK,
+        }, {
+                .ids = HEND_IP_PHONE_MODE | HEND_WIFI_PHONE_MODE,
+                .mask = PMX_MII_MASK | PMX_TIMER_1_2_MASK,
+        }, {
+                .ids = ATA_PABX_WI2S_MODE,
+                .mask = PMX_MII_MASK | PMX_TIMER_1_2_MASK | PMX_TIMER_3_4_MASK
+                        | PMX_UART0_MODEM_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_gpio = {
+        .name = "telecom_gpio",
+        .modes = pmx_telecom_gpio_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_gpio_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_tdm_modes[] = {
+        {
+                .ids = PHOTO_FRAME_MODE | LEND_IP_PHONE_MODE |
+                        HEND_IP_PHONE_MODE | LEND_WIFI_PHONE_MODE
+                        | HEND_WIFI_PHONE_MODE | ATA_PABX_WI2S_MODE
+                        | ATA_PABX_I2S_MODE | CAML_LCDW_MODE | CAMU_LCD_MODE
+                        | CAMU_WLCD_MODE | CAML_LCD_MODE,
+                .mask = PMX_UART0_MODEM_MASK | PMX_SSP_CS_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_tdm = {
+        .name = "telecom_tdm",
+        .modes = pmx_telecom_tdm_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_tdm_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_spi_cs_i2c_clk_modes[] = {
+        {
+                .ids = LEND_IP_PHONE_MODE | HEND_IP_PHONE_MODE |
+                        LEND_WIFI_PHONE_MODE | HEND_WIFI_PHONE_MODE
+                        | ATA_PABX_WI2S_MODE | ATA_PABX_I2S_MODE |
+                        CAML_LCDW_MODE | CAML_LCD_MODE,
+                .mask = PMX_TIMER_1_2_MASK | PMX_TIMER_3_4_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_spi_cs_i2c_clk = {
+        .name = "telecom_spi_cs_i2c_clk",
+        .modes = pmx_telecom_spi_cs_i2c_clk_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_spi_cs_i2c_clk_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_camera_modes[] = {
+        {
+                .ids = CAML_LCDW_MODE | CAML_LCD_MODE,
+                .mask = PMX_MII_MASK,
+        }, {
+                .ids = CAMU_LCD_MODE | CAMU_WLCD_MODE,
+                .mask = PMX_TIMER_1_2_MASK | PMX_TIMER_3_4_MASK | PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_camera = {
+        .name = "telecom_camera",
+        .modes = pmx_telecom_camera_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_camera_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_dac_modes[] = {
+        {
+                .ids = ATA_PABX_I2S_MODE | CAML_LCDW_MODE | CAMU_LCD_MODE
+                        | CAMU_WLCD_MODE | CAML_LCD_MODE,
+                .mask = PMX_TIMER_1_2_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_dac = {
+        .name = "telecom_dac",
+        .modes = pmx_telecom_dac_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_dac_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_i2s_modes[] = {
+        {
+                .ids = LEND_IP_PHONE_MODE | HEND_IP_PHONE_MODE
+                        | LEND_WIFI_PHONE_MODE | HEND_WIFI_PHONE_MODE |
+                        ATA_PABX_I2S_MODE | CAML_LCDW_MODE | CAMU_LCD_MODE
+                        | CAMU_WLCD_MODE | CAML_LCD_MODE,
+                .mask = PMX_UART0_MODEM_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_i2s = {
+        .name = "telecom_i2s",
+        .modes = pmx_telecom_i2s_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_i2s_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_boot_pins_modes[] = {
+        {
+                .ids = NAND_MODE | NOR_MODE,
+                .mask = PMX_UART0_MODEM_MASK | PMX_TIMER_1_2_MASK |
+                        PMX_TIMER_3_4_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_boot_pins = {
+        .name = "telecom_boot_pins",
+        .modes = pmx_telecom_boot_pins_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_boot_pins_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_sdio_4bit_modes[] = {
+        {
+                .ids = PHOTO_FRAME_MODE | LEND_IP_PHONE_MODE |
+                        HEND_IP_PHONE_MODE | LEND_WIFI_PHONE_MODE |
+                        HEND_WIFI_PHONE_MODE | CAML_LCDW_MODE | CAMU_LCD_MODE |
+                        CAMU_WLCD_MODE | CAML_LCD_MODE | ATA_PABX_WI2S_MODE |
+                        ATA_PABX_I2S_MODE,
+                .mask = PMX_GPIO_PIN0_MASK | PMX_GPIO_PIN1_MASK |
+                        PMX_GPIO_PIN2_MASK | PMX_GPIO_PIN3_MASK |
+                        PMX_GPIO_PIN4_MASK | PMX_GPIO_PIN5_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_sdio_4bit = {
+        .name = "telecom_sdio_4bit",
+        .modes = pmx_telecom_sdio_4bit_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_sdio_4bit_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_telecom_sdio_8bit_modes[] = {
+        {
+                .ids = PHOTO_FRAME_MODE | LEND_IP_PHONE_MODE |
+                        HEND_IP_PHONE_MODE | LEND_WIFI_PHONE_MODE |
+                        HEND_WIFI_PHONE_MODE | CAML_LCDW_MODE | CAMU_LCD_MODE |
+                        CAMU_WLCD_MODE | CAML_LCD_MODE,
+                .mask = PMX_GPIO_PIN0_MASK | PMX_GPIO_PIN1_MASK |
+                        PMX_GPIO_PIN2_MASK | PMX_GPIO_PIN3_MASK |
+                        PMX_GPIO_PIN4_MASK | PMX_GPIO_PIN5_MASK | PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_telecom_sdio_8bit = {
+        .name = "telecom_sdio_8bit",
+        .modes = pmx_telecom_sdio_8bit_modes,
+        .mode_count = ARRAY_SIZE(pmx_telecom_sdio_8bit_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_gpio1_modes[] = {
+        {
+                .ids = PHOTO_FRAME_MODE,
+                .mask = PMX_UART0_MODEM_MASK | PMX_TIMER_1_2_MASK |
+                        PMX_TIMER_3_4_MASK,
+        },
+};
+
+struct pmx_dev pmx_gpio1 = {
+        .name = "arm gpio1",
+        .modes = pmx_gpio1_modes,
+        .mode_count = ARRAY_SIZE(pmx_gpio1_modes),
+        .enb_on_reset = 1,
+};
+
+/* pmx driver structure */
+struct pmx_driver pmx_driver = {
+        .mode_reg = {.offset = MODE_CONFIG_REG, .mask = 0x0000000f},
+        .mux_reg = {.offset = PAD_MUX_CONFIG_REG, .mask = 0x00007fff},
+};
+
 /* Add spear300 specific devices here */
 /* arm gpio1 device registeration */
 static struct pl061_platform_data gpio1_plat_data = {
@@ -38,8 +389,15 @@ struct amba_device gpio1_device = {
         .irq = {IRQ_GEN_RAS_1, NO_IRQ},
 };
 
+/* spear300 routines */
 void __init spear300_init(void)
 {
         /* call spear3xx family common init function */
         spear3xx_init();
 }
+
+void spear300_pmx_init(void)
+{
+        spear_pmx_init(&pmx_driver, SPEAR300_SOC_CONFIG_BASE,
+                        SPEAR300_SOC_CONFIG_SIZE);
+}