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, 374 insertions, 0 deletions

diff --git a/arch/arm/mach-spear3xx/spear320.c b/arch/arm/mach-spear3xx/spear320.c
index 72d45489dcb0..2cedf5eb9ec9 100644
--- a/arch/arm/mach-spear3xx/spear320.c
+++ b/arch/arm/mach-spear3xx/spear320.c
@@ -16,10 +16,384 @@
 #include <mach/generic.h>
 #include <mach/spear.h>
 
+/* pad multiplexing support */
+/* muxing registers */
+#define PAD_MUX_CONFIG_REG      0x0C
+#define MODE_CONFIG_REG         0x10
+
+/* modes */
+#define AUTO_NET_SMII_MODE      (1 << 0)
+#define AUTO_NET_MII_MODE       (1 << 1)
+#define AUTO_EXP_MODE           (1 << 2)
+#define SMALL_PRINTERS_MODE     (1 << 3)
+#define ALL_MODES               0xF
+
+struct pmx_mode auto_net_smii_mode = {
+        .id = AUTO_NET_SMII_MODE,
+        .name = "Automation Networking SMII Mode",
+        .mask = 0x00,
+};
+
+struct pmx_mode auto_net_mii_mode = {
+        .id = AUTO_NET_MII_MODE,
+        .name = "Automation Networking MII Mode",
+        .mask = 0x01,
+};
+
+struct pmx_mode auto_exp_mode = {
+        .id = AUTO_EXP_MODE,
+        .name = "Automation Expanded Mode",
+        .mask = 0x02,
+};
+
+struct pmx_mode small_printers_mode = {
+        .id = SMALL_PRINTERS_MODE,
+        .name = "Small Printers Mode",
+        .mask = 0x03,
+};
+
+/* devices */
+struct pmx_dev_mode pmx_clcd_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE,
+                .mask = 0x0,
+        },
+};
+
+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_emi_modes[] = {
+        {
+                .ids = AUTO_EXP_MODE,
+                .mask = PMX_TIMER_1_2_MASK | PMX_TIMER_3_4_MASK,
+        },
+};
+
+struct pmx_dev pmx_emi = {
+        .name = "emi",
+        .modes = pmx_emi_modes,
+        .mode_count = ARRAY_SIZE(pmx_emi_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_fsmc_modes[] = {
+        {
+                .ids = ALL_MODES,
+                .mask = 0x0,
+        },
+};
+
+struct pmx_dev pmx_fsmc = {
+        .name = "fsmc",
+        .modes = pmx_fsmc_modes,
+        .mode_count = ARRAY_SIZE(pmx_fsmc_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_spp_modes[] = {
+        {
+                .ids = SMALL_PRINTERS_MODE,
+                .mask = 0x0,
+        },
+};
+
+struct pmx_dev pmx_spp = {
+        .name = "spp",
+        .modes = pmx_spp_modes,
+        .mode_count = ARRAY_SIZE(pmx_spp_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_sdio_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | AUTO_NET_MII_MODE |
+                        SMALL_PRINTERS_MODE,
+                .mask = PMX_TIMER_1_2_MASK | PMX_TIMER_3_4_MASK,
+        },
+};
+
+struct pmx_dev pmx_sdio = {
+        .name = "sdio",
+        .modes = pmx_sdio_modes,
+        .mode_count = ARRAY_SIZE(pmx_sdio_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_i2s_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | AUTO_NET_MII_MODE,
+                .mask = PMX_UART0_MODEM_MASK,
+        },
+};
+
+struct pmx_dev pmx_i2s = {
+        .name = "i2s",
+        .modes = pmx_i2s_modes,
+        .mode_count = ARRAY_SIZE(pmx_i2s_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_uart1_modes[] = {
+        {
+                .ids = ALL_MODES,
+                .mask = PMX_GPIO_PIN0_MASK | PMX_GPIO_PIN1_MASK,
+        },
+};
+
+struct pmx_dev pmx_uart1 = {
+        .name = "uart1",
+        .modes = pmx_uart1_modes,
+        .mode_count = ARRAY_SIZE(pmx_uart1_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_uart1_modem_modes[] = {
+        {
+                .ids = AUTO_EXP_MODE,
+                .mask = PMX_TIMER_1_2_MASK | PMX_TIMER_3_4_MASK |
+                        PMX_SSP_CS_MASK,
+        }, {
+                .ids = SMALL_PRINTERS_MODE,
+                .mask = PMX_GPIO_PIN3_MASK | PMX_GPIO_PIN4_MASK |
+                        PMX_GPIO_PIN5_MASK | PMX_SSP_CS_MASK,
+        },
+};
+
+struct pmx_dev pmx_uart1_modem = {
+        .name = "uart1_modem",
+        .modes = pmx_uart1_modem_modes,
+        .mode_count = ARRAY_SIZE(pmx_uart1_modem_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_uart2_modes[] = {
+        {
+                .ids = ALL_MODES,
+                .mask = PMX_FIRDA_MASK,
+        },
+};
+
+struct pmx_dev pmx_uart2 = {
+        .name = "uart2",
+        .modes = pmx_uart2_modes,
+        .mode_count = ARRAY_SIZE(pmx_uart2_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_touchscreen_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE,
+                .mask = PMX_SSP_CS_MASK,
+        },
+};
+
+struct pmx_dev pmx_touchscreen = {
+        .name = "touchscreen",
+        .modes = pmx_touchscreen_modes,
+        .mode_count = ARRAY_SIZE(pmx_touchscreen_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_can_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | AUTO_NET_MII_MODE | AUTO_EXP_MODE,
+                .mask = PMX_GPIO_PIN2_MASK | PMX_GPIO_PIN3_MASK |
+                        PMX_GPIO_PIN4_MASK | PMX_GPIO_PIN5_MASK,
+        },
+};
+
+struct pmx_dev pmx_can = {
+        .name = "can",
+        .modes = pmx_can_modes,
+        .mode_count = ARRAY_SIZE(pmx_can_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_sdio_led_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | AUTO_NET_MII_MODE,
+                .mask = PMX_SSP_CS_MASK,
+        },
+};
+
+struct pmx_dev pmx_sdio_led = {
+        .name = "sdio_led",
+        .modes = pmx_sdio_led_modes,
+        .mode_count = ARRAY_SIZE(pmx_sdio_led_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_pwm0_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | AUTO_NET_MII_MODE,
+                .mask = PMX_UART0_MODEM_MASK,
+        }, {
+                .ids = AUTO_EXP_MODE | SMALL_PRINTERS_MODE,
+                .mask = PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_pwm0 = {
+        .name = "pwm0",
+        .modes = pmx_pwm0_modes,
+        .mode_count = ARRAY_SIZE(pmx_pwm0_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_pwm1_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | AUTO_NET_MII_MODE,
+                .mask = PMX_UART0_MODEM_MASK,
+        }, {
+                .ids = AUTO_EXP_MODE | SMALL_PRINTERS_MODE,
+                .mask = PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_pwm1 = {
+        .name = "pwm1",
+        .modes = pmx_pwm1_modes,
+        .mode_count = ARRAY_SIZE(pmx_pwm1_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_pwm2_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | AUTO_NET_MII_MODE,
+                .mask = PMX_SSP_CS_MASK,
+        }, {
+                .ids = AUTO_EXP_MODE | SMALL_PRINTERS_MODE,
+                .mask = PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_pwm2 = {
+        .name = "pwm2",
+        .modes = pmx_pwm2_modes,
+        .mode_count = ARRAY_SIZE(pmx_pwm2_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_pwm3_modes[] = {
+        {
+                .ids = AUTO_EXP_MODE | SMALL_PRINTERS_MODE | AUTO_NET_SMII_MODE,
+                .mask = PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_pwm3 = {
+        .name = "pwm3",
+        .modes = pmx_pwm3_modes,
+        .mode_count = ARRAY_SIZE(pmx_pwm3_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_ssp1_modes[] = {
+        {
+                .ids = SMALL_PRINTERS_MODE | AUTO_NET_SMII_MODE,
+                .mask = PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_ssp1 = {
+        .name = "ssp1",
+        .modes = pmx_ssp1_modes,
+        .mode_count = ARRAY_SIZE(pmx_ssp1_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_ssp2_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE,
+                .mask = PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_ssp2 = {
+        .name = "ssp2",
+        .modes = pmx_ssp2_modes,
+        .mode_count = ARRAY_SIZE(pmx_ssp2_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_mii1_modes[] = {
+        {
+                .ids = AUTO_NET_MII_MODE,
+                .mask = 0x0,
+        },
+};
+
+struct pmx_dev pmx_mii1 = {
+        .name = "mii1",
+        .modes = pmx_mii1_modes,
+        .mode_count = ARRAY_SIZE(pmx_mii1_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_smii0_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | AUTO_EXP_MODE | SMALL_PRINTERS_MODE,
+                .mask = PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_smii0 = {
+        .name = "smii0",
+        .modes = pmx_smii0_modes,
+        .mode_count = ARRAY_SIZE(pmx_smii0_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_smii1_modes[] = {
+        {
+                .ids = AUTO_NET_SMII_MODE | SMALL_PRINTERS_MODE,
+                .mask = PMX_MII_MASK,
+        },
+};
+
+struct pmx_dev pmx_smii1 = {
+        .name = "smii1",
+        .modes = pmx_smii1_modes,
+        .mode_count = ARRAY_SIZE(pmx_smii1_modes),
+        .enb_on_reset = 1,
+};
+
+struct pmx_dev_mode pmx_i2c1_modes[] = {
+        {
+                .ids = AUTO_EXP_MODE,
+                .mask = 0x0,
+        },
+};
+
+struct pmx_dev pmx_i2c1 = {
+        .name = "i2c1",
+        .modes = pmx_i2c1_modes,
+        .mode_count = ARRAY_SIZE(pmx_i2c1_modes),
+        .enb_on_reset = 1,
+};
+
+/* pmx driver structure */
+struct pmx_driver pmx_driver = {
+        .mode_reg = {.offset = MODE_CONFIG_REG, .mask = 0x00000007},
+        .mux_reg = {.offset = PAD_MUX_CONFIG_REG, .mask = 0x00007fff},
+};
+
 /* Add spear320 specific devices here */
 
+/* spear320 routines */
 void __init spear320_init(void)
 {
         /* call spear3xx family common init function */
         spear3xx_init();
 }
+
+void spear320_pmx_init(void)
+{
+        spear_pmx_init(&pmx_driver, SPEAR320_SOC_CONFIG_BASE,
+                        SPEAR320_SOC_CONFIG_SIZE);
+}