[ARM] orion5x: Base support for DNS-323 rev C1

This patch adds the base support for this new HW revision to the existing
dns323-setup.c file. The SoC seems to be the same as rev B1, the GPIOs
are all wired differently though and the fan control isn't i2c based
anymore.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>

1 files changed, 305 insertions, 62 deletions

diff --git a/arch/arm/mach-orion5x/dns323-setup.c b/arch/arm/mach-orion5x/dns323-setup.c
index fdf16e9193a..a47100d46a4 100644
--- a/arch/arm/mach-orion5x/dns323-setup.c
+++ b/arch/arm/mach-orion5x/dns323-setup.c
@@ -3,6 +3,10 @@
  *
  * Copyright (C) 2007 Herbert Valerio Riedel <hvr@gnu.org>
  *
+ * Support for HW Rev C1:
+ *
+ * Copyright (C) 2010 Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as
  * published by the Free Software Foundation; either version 2 of the
@@ -23,6 +27,8 @@
 #include <linux/input.h>
 #include <linux/i2c.h>
 #include <linux/ata_platform.h>
+#include <linux/phy.h>
+#include <linux/marvell_phy.h>
 #include <asm/mach-types.h>
 #include <asm/gpio.h>
 #include <asm/mach/arch.h>
@@ -31,6 +37,7 @@
 #include "common.h"
 #include "mpp.h"
 
+/* Rev A1 and B1 */
 #define DNS323_GPIO_LED_RIGHT_AMBER     1
 #define DNS323_GPIO_LED_LEFT_AMBER      2
 #define DNS323_GPIO_SYSTEM_UP           3
@@ -42,6 +49,23 @@
 #define DNS323_GPIO_KEY_POWER           9
 #define DNS323_GPIO_KEY_RESET           10
 
+/* Rev C1 */
+#define DNS323C_GPIO_KEY_POWER          1
+#define DNS323C_GPIO_POWER_OFF          2
+#define DNS323C_GPIO_LED_RIGHT_AMBER    8
+#define DNS323C_GPIO_LED_LEFT_AMBER     9
+#define DNS323C_GPIO_LED_POWER          17
+#define DNS323C_GPIO_FAN_BIT1           18
+#define DNS323C_GPIO_FAN_BIT0           19
+
+/* Exposed to userspace, do not change */
+enum {
+        DNS323_REV_A1,  /* 0 */
+        DNS323_REV_B1,  /* 1 */
+        DNS323_REV_C1,  /* 2 */
+};
+
+
 /****************************************************************************
  * PCI setup
  */
@@ -68,21 +92,12 @@ static struct hw_pci dns323_pci __initdata = {
         .map_irq        = dns323_pci_map_irq,
 };
 
-static int __init dns323_dev_id(void)
-{
-        u32 dev, rev;
-
-        orion5x_pcie_id(&dev, &rev);
-
-        return dev;
-}
-
 static int __init dns323_pci_init(void)
 {
-        /* The 5182 doesn't really use its PCI bus, and initialising PCI
+        /* Rev B1 and C1 doesn't really use its PCI bus, and initialising PCI
          * gets in the way of initialising the SATA controller.
          */
-        if (machine_is_dns323() && dns323_dev_id() != MV88F5182_DEV_ID)
+        if (machine_is_dns323() && system_rev == DNS323_REV_A1)
                 pci_common_init(&dns323_pci);
 
         return 0;
@@ -221,7 +236,7 @@ static int __init dns323_read_mac_addr(void)
         }
 
         iounmap(mac_page);
-        printk("DNS323: Found ethernet MAC address: ");
+        printk("DNS-323: Found ethernet MAC address: ");
         for (i = 0; i < 6; i++)
                 printk("%.2x%s", addr[i], (i < 5) ? ":" : ".\n");
 
@@ -259,7 +274,7 @@ static int dns323_gpio_blink_set(unsigned gpio, int state,
         return 0;
 }
 
-static struct gpio_led dns323_leds[] = {
+static struct gpio_led dns323ab_leds[] = {
         {
                 .name = "power:blue",
                 .gpio = DNS323_GPIO_LED_POWER2,
@@ -275,9 +290,34 @@ static struct gpio_led dns323_leds[] = {
         },
 };
 
-static struct gpio_led_platform_data dns323_led_data = {
-        .num_leds       = ARRAY_SIZE(dns323_leds),
-        .leds           = dns323_leds,
+
+static struct gpio_led dns323c_leds[] = {
+        {
+                .name = "power:blue",
+                .gpio = DNS323C_GPIO_LED_POWER,
+                .default_trigger = "timer",
+                .active_low = 1,
+        }, {
+                .name = "right:amber",
+                .gpio = DNS323C_GPIO_LED_RIGHT_AMBER,
+                .active_low = 1,
+        }, {
+                .name = "left:amber",
+                .gpio = DNS323C_GPIO_LED_LEFT_AMBER,
+                .active_low = 1,
+        },
+};
+
+
+static struct gpio_led_platform_data dns323ab_led_data = {
+        .num_leds       = ARRAY_SIZE(dns323ab_leds),
+        .leds           = dns323ab_leds,
+        .gpio_blink_set = dns323_gpio_blink_set,
+};
+
+static struct gpio_led_platform_data dns323c_led_data = {
+        .num_leds       = ARRAY_SIZE(dns323c_leds),
+        .leds           = dns323c_leds,
         .gpio_blink_set = dns323_gpio_blink_set,
 };
 
@@ -285,7 +325,7 @@ static struct platform_device dns323_gpio_leds = {
         .name           = "leds-gpio",
         .id             = -1,
         .dev            = {
-                .platform_data  = &dns323_led_data,
+                .platform_data  = &dns323ab_led_data,
         },
 };
 
@@ -293,7 +333,7 @@ static struct platform_device dns323_gpio_leds = {
  * GPIO Attached Keys
  */
 
-static struct gpio_keys_button dns323_buttons[] = {
+static struct gpio_keys_button dns323ab_buttons[] = {
         {
                 .code           = KEY_RESTART,
                 .gpio           = DNS323_GPIO_KEY_RESET,
@@ -307,9 +347,23 @@ static struct gpio_keys_button dns323_buttons[] = {
         },
 };
 
-static struct gpio_keys_platform_data dns323_button_data = {
-        .buttons        = dns323_buttons,
-        .nbuttons       = ARRAY_SIZE(dns323_buttons),
+static struct gpio_keys_platform_data dns323ab_button_data = {
+        .buttons        = dns323ab_buttons,
+        .nbuttons       = ARRAY_SIZE(dns323ab_buttons),
+};
+
+static struct gpio_keys_button dns323c_buttons[] = {
+        {
+                .code           = KEY_POWER,
+                .gpio           = DNS323C_GPIO_KEY_POWER,
+                .desc           = "Power Button",
+                .active_low     = 1,
+        },
+};
+
+static struct gpio_keys_platform_data dns323c_button_data = {
+        .buttons        = dns323c_buttons,
+        .nbuttons       = ARRAY_SIZE(dns323c_buttons),
 };
 
 static struct platform_device dns323_button_device = {
@@ -317,7 +371,7 @@ static struct platform_device dns323_button_device = {
         .id             = -1,
         .num_resources  = 0,
         .dev            = {
-                .platform_data  = &dns323_button_data,
+                .platform_data  = &dns323ab_button_data,
         },
 };
 
@@ -331,7 +385,7 @@ static struct mv_sata_platform_data dns323_sata_data = {
 /****************************************************************************
  * General Setup
  */
-static struct orion5x_mpp_mode dns323_mv88f5181_mpp_modes[] __initdata = {
+static struct orion5x_mpp_mode dns323a_mpp_modes[] __initdata = {
         {  0, MPP_PCIE_RST_OUTn },
         {  1, MPP_GPIO },               /* right amber LED (sata ch0) */
         {  2, MPP_GPIO },               /* left amber LED (sata ch1) */
@@ -355,7 +409,7 @@ static struct orion5x_mpp_mode dns323_mv88f5181_mpp_modes[] __initdata = {
         { -1 },
 };
 
-static struct orion5x_mpp_mode dns323_mv88f5182_mpp_modes[] __initdata = {
+static struct orion5x_mpp_mode dns323b_mpp_modes[] __initdata = {
         {  0, MPP_UNUSED },
         {  1, MPP_GPIO },               /* right amber LED (sata ch0) */
         {  2, MPP_GPIO },               /* left amber LED (sata ch1) */
@@ -379,15 +433,57 @@ static struct orion5x_mpp_mode dns323_mv88f5182_mpp_modes[] __initdata = {
         { -1 },
 };
 
+static struct orion5x_mpp_mode dns323c_mpp_modes[] __initdata = {
+        {  0, MPP_GPIO },               /* ? input */
+        {  1, MPP_GPIO },               /* input power switch (0 = pressed) */
+        {  2, MPP_GPIO },               /* output power off */
+        {  3, MPP_UNUSED },             /* ? output */
+        {  4, MPP_UNUSED },             /* ? output */
+        {  5, MPP_UNUSED },             /* ? output */
+        {  6, MPP_UNUSED },             /* ? output */
+        {  7, MPP_UNUSED },             /* ? output */
+        {  8, MPP_GPIO },               /* i/o right amber LED */
+        {  9, MPP_GPIO },               /* i/o left amber LED */
+        { 10, MPP_GPIO },               /* input */
+        { 11, MPP_UNUSED },
+        { 12, MPP_SATA_LED },
+        { 13, MPP_SATA_LED },
+        { 14, MPP_SATA_LED },
+        { 15, MPP_SATA_LED },
+        { 16, MPP_UNUSED },
+        { 17, MPP_GPIO },               /* power button LED */
+        { 18, MPP_GPIO },               /* fan speed bit 0 */
+        { 19, MPP_GPIO },               /* fan speed bit 1 */
+        { -1 },
+};
+
+/* Rev C1 Fan speed notes:
+ *
+ * The fan is controlled by 2 GPIOs on this board. The settings
+ * of the bits is as follow:
+ *
+ *  GPIO 18    GPIO 19    Fan
+ *
+ *    0          0        stopped
+ *    0          1        low speed
+ *    1          0        high speed
+ *    1          1        don't do that (*)
+ *
+ * (*) I think the two bits control two feed-in resistors into a fixed
+ *     PWN circuit, setting both bits will basically go a 'bit' faster
+ *     than high speed, but d-link doesn't do it and you may get out of
+ *     HW spec so don't do it.
+ */
+
 /*
- * On the DNS-323 the following devices are attached via I2C:
+ * On the DNS-323 A1 and B1 the following devices are attached via I2C:
  *
  *  i2c addr | chip        | description
  *  0x3e     | GMT G760Af  | fan speed PWM controller
  *  0x48     | GMT G751-2f | temp. sensor and therm. watchdog (LM75 compatible)
  *  0x68     | ST M41T80   | RTC w/ alarm
  */
-static struct i2c_board_info __initdata dns323_i2c_devices[] = {
+static struct i2c_board_info __initdata dns323ab_i2c_devices[] = {
         {
                 I2C_BOARD_INFO("g760a", 0x3e),
         }, {
@@ -397,36 +493,140 @@ static struct i2c_board_info __initdata dns323_i2c_devices[] = {
         },
 };
 
+/*
+ * On the DNS-323 C1 the following devices are attached via I2C:
+ *
+ *  i2c addr | chip        | description
+ *  0x48     | GMT G751-2f | temp. sensor and therm. watchdog (LM75 compatible)
+ *  0x68     | ST M41T80   | RTC w/ alarm
+ */
+static struct i2c_board_info __initdata dns323c_i2c_devices[] = {
+        {
+                I2C_BOARD_INFO("lm75", 0x48),
+        }, {
+                I2C_BOARD_INFO("m41t80", 0x68),
+        },
+};
+
 /* DNS-323 rev. A specific power off method */
 static void dns323a_power_off(void)
 {
-        pr_info("%s: triggering power-off...\n", __func__);
+        pr_info("DNS-323: Triggering power-off...\n");
         gpio_set_value(DNS323_GPIO_POWER_OFF, 1);
 }
 
 /* DNS-323 rev B specific power off method */
 static void dns323b_power_off(void)
 {
-        pr_info("%s: triggering power-off...\n", __func__);
+        pr_info("DNS-323: Triggering power-off...\n");
         /* Pin has to be changed to 1 and back to 0 to do actual power off. */
         gpio_set_value(DNS323_GPIO_POWER_OFF, 1);
         mdelay(100);
         gpio_set_value(DNS323_GPIO_POWER_OFF, 0);
 }
 
+/* DNS-323 rev. C specific power off method */
+static void dns323c_power_off(void)
+{
+        pr_info("DNS-323: Triggering power-off...\n");
+        gpio_set_value(DNS323C_GPIO_POWER_OFF, 1);
+}
+
+static int dns323c_phy_fixup(struct phy_device *phy)
+{
+        phy->dev_flags |= MARVELL_PHY_M1118_DNS323_LEDS;
+
+        return 0;
+}
+
+static int __init dns323_identify_rev(void)
+{
+        u32 dev, rev, i, reg;
+
+        pr_debug("DNS-323: Identifying board ... \n");
+
+        /* Rev A1 has a 5181 */
+        orion5x_pcie_id(&dev, &rev);
+        if (dev == MV88F5181_DEV_ID) {
+                pr_debug("DNS-323: 5181 found, board is A1\n");
+                return DNS323_REV_A1;
+        }
+        pr_debug("DNS-323: 5182 found, board is B1 or C1, checking PHY...\n");
+
+        /* Rev B1 and C1 both have 5182, let's poke at the eth PHY. This is
+         * a bit gross but we want to do that without links into the eth
+         * driver so let's poke at it directly. We default to rev B1 in
+         * case the accesses fail
+         */
+
+#define ETH_SMI_REG             (ORION5X_ETH_VIRT_BASE + 0x2000 + 0x004)
+#define  SMI_BUSY               0x10000000
+#define  SMI_READ_VALID         0x08000000
+#define  SMI_OPCODE_READ        0x04000000
+#define  SMI_OPCODE_WRITE       0x00000000
+
+        for (i = 0; i < 1000; i++) {
+                reg = readl(ETH_SMI_REG);
+                if (!(reg & SMI_BUSY))
+                        break;
+        }
+        if (i >= 1000) {
+                pr_warning("DNS-323: Timeout accessing PHY, assuming rev B1\n");
+                return DNS323_REV_B1;
+        }
+        writel((3 << 21)        /* phy ID reg */ |
+               (8 << 16)        /* phy addr */ |
+               SMI_OPCODE_READ, ETH_SMI_REG);
+        for (i = 0; i < 1000; i++) {
+                reg = readl(ETH_SMI_REG);
+                if (reg & SMI_READ_VALID)
+                        break;
+        }
+        if (i >= 1000) {
+                pr_warning("DNS-323: Timeout reading PHY, assuming rev B1\n");
+                return DNS323_REV_B1;
+        }
+        pr_debug("DNS-323: Ethernet PHY ID 0x%x\n", reg & 0xffff);
+
+        /* Note: the Marvell tools mask the ID with 0x3f0 before comparison
+         * but I don't see that making a difference here, at least with
+         * any known Marvell PHY ID
+         */
+        switch(reg & 0xfff0) {
+        case 0x0cc0: /* MV88E1111 */
+                return DNS323_REV_B1;
+        case 0x0e10: /* MV88E1118 */
+                return DNS323_REV_C1;
+        default:
+                pr_warning("DNS-323: Unknown PHY ID 0x%04x, assuming rev B1\n",
+                           reg & 0xffff);
+        }
+        return DNS323_REV_B1;
+}
+
 static void __init dns323_init(void)
 {
         /* Setup basic Orion functions. Need to be called early. */
         orion5x_init();
 
+        /* Identify revision */
+        system_rev = dns323_identify_rev();
+        pr_info("DNS-323: Identified HW revision %c1\n", 'A' + system_rev);
+
         /* Just to be tricky, the 5182 has a completely different
          * set of MPP modes to the 5181.
          */
-        if (dns323_dev_id() == MV88F5182_DEV_ID)
-                orion5x_mpp_conf(dns323_mv88f5182_mpp_modes);
-        else {
-                orion5x_mpp_conf(dns323_mv88f5181_mpp_modes);
+        switch(system_rev) {
+        case DNS323_REV_A1:
+                orion5x_mpp_conf(dns323a_mpp_modes);
                 writel(0, MPP_DEV_CTRL);                /* DEV_D[31:16] */
+                break;
+        case DNS323_REV_B1:
+                orion5x_mpp_conf(dns323b_mpp_modes);
+                break;
+        case DNS323_REV_C1:
+                orion5x_mpp_conf(dns323c_mpp_modes);
+                break;
         }
 
         /* setup flash mapping
@@ -435,53 +635,96 @@ static void __init dns323_init(void)
         orion5x_setup_dev_boot_win(DNS323_NOR_BOOT_BASE, DNS323_NOR_BOOT_SIZE);
         platform_device_register(&dns323_nor_flash);
 
-        /* The 5181 power LED is active low and requires
-         * DNS323_GPIO_LED_POWER1 to also be low.
-         */
-        if (dns323_dev_id() == MV88F5181_DEV_ID) {
-                dns323_leds[0].active_low = 1;
-                gpio_request(DNS323_GPIO_LED_POWER1, "Power Led Enable");
-                gpio_direction_output(DNS323_GPIO_LED_POWER1, 0);
+        /* Sort out LEDs, Buttons and i2c devices */
+        switch(system_rev) {
+        case DNS323_REV_A1:
+                /* The 5181 power LED is active low and requires
+                 * DNS323_GPIO_LED_POWER1 to also be low.
+                 */
+                 dns323ab_leds[0].active_low = 1;
+                 gpio_request(DNS323_GPIO_LED_POWER1, "Power Led Enable");
+                 gpio_direction_output(DNS323_GPIO_LED_POWER1, 0);
+                /* Fall through */
+        case DNS323_REV_B1:
+                i2c_register_board_info(0, dns323ab_i2c_devices,
+                                ARRAY_SIZE(dns323ab_i2c_devices));
+                break;
+        case DNS323_REV_C1:
+                /* Hookup LEDs & Buttons */
+                dns323_gpio_leds.dev.platform_data = &dns323c_led_data;
+                dns323_button_device.dev.platform_data = &dns323c_button_data;
+
+                /* Hookup i2c devices and fan driver */
+                i2c_register_board_info(0, dns323c_i2c_devices,
+                                ARRAY_SIZE(dns323c_i2c_devices));
+                platform_device_register_simple("dns323c-fan", 0, NULL, 0);
+
+                /* Register fixup for the PHY LEDs */
+                phy_register_fixup_for_uid(MARVELL_PHY_ID_88E1118,
+                                           MARVELL_PHY_ID_MASK,
+                                           dns323c_phy_fixup);
         }
 
         platform_device_register(&dns323_gpio_leds);
-
         platform_device_register(&dns323_button_device);
 
-        i2c_register_board_info(0, dns323_i2c_devices,
-                                ARRAY_SIZE(dns323_i2c_devices));
-
         /*
          * Configure peripherals.
          */
         if (dns323_read_mac_addr() < 0)
-                printk("DNS323: Failed to read MAC address\n");
-
+                printk("DNS-323: Failed to read MAC address\n");
         orion5x_ehci0_init();
         orion5x_eth_init(&dns323_eth_data);
         orion5x_i2c_init();
         orion5x_uart0_init();
 
-        /* The 5182 has its SATA controller on-chip, and needs its own little
-         * init routine.
-         */
-        if (dns323_dev_id() == MV88F5182_DEV_ID)
+        /* Remaining GPIOs */
+        switch(system_rev) {
+        case DNS323_REV_A1:
+                /* Poweroff GPIO */
+                if (gpio_request(DNS323_GPIO_POWER_OFF, "POWEROFF") != 0 ||
+                    gpio_direction_output(DNS323_GPIO_POWER_OFF, 0) != 0)
+                        pr_err("DNS-323: failed to setup power-off GPIO\n");
+                pm_power_off = dns323a_power_off;
+                break;
+        case DNS323_REV_B1:
+                /* 5182 built-in SATA init */
                 orion5x_sata_init(&dns323_sata_data);
 
-        /* The 5182 has flag to indicate the system is up. Without this flag
-         * set, power LED will flash and cannot be controlled via leds-gpio.
-         */
-        if (dns323_dev_id() == MV88F5182_DEV_ID)
-                gpio_set_value(DNS323_GPIO_SYSTEM_UP, 1);
-
-        /* Register dns323 specific power-off method */
-        if (gpio_request(DNS323_GPIO_POWER_OFF, "POWEROFF") != 0 ||
-            gpio_direction_output(DNS323_GPIO_POWER_OFF, 0) != 0)
-                pr_err("DNS323: failed to setup power-off GPIO\n");
-        if (dns323_dev_id() == MV88F5182_DEV_ID)
+                /* The DNS323 rev B1 has flag to indicate the system is up.
+                 * Without this flag set, power LED will flash and cannot be
+                 * controlled via leds-gpio.
+                 */
+                if (gpio_request(DNS323_GPIO_SYSTEM_UP, "SYS_READY") == 0)
+                        gpio_direction_output(DNS323_GPIO_SYSTEM_UP, 1);
+
+                /* Poweroff GPIO */
+                if (gpio_request(DNS323_GPIO_POWER_OFF, "POWEROFF") != 0 ||
+                    gpio_direction_output(DNS323_GPIO_POWER_OFF, 0) != 0)
+                        pr_err("DNS-323: failed to setup power-off GPIO\n");
                 pm_power_off = dns323b_power_off;
-        else
-                pm_power_off = dns323a_power_off;
+                break;
+        case DNS323_REV_C1:
+                /* 5182 built-in SATA init */
+                orion5x_sata_init(&dns323_sata_data);
+
+                /* Poweroff GPIO */
+                if (gpio_request(DNS323C_GPIO_POWER_OFF, "POWEROFF") != 0 ||
+                    gpio_direction_output(DNS323C_GPIO_POWER_OFF, 0) != 0)
+                        pr_err("DNS-323: failed to setup power-off GPIO\n");
+                pm_power_off = dns323c_power_off;
+
+                /* Now, -this- should theorically be done by the sata_mv driver
+                 * once I figure out what's going on there. Maybe the behaviour
+                 * of the LEDs should be somewhat passed via the platform_data.
+                 * for now, just whack the register and make the LEDs happy
+                 *
+                 * Note: AFAIK, rev B1 needs the same treatement but I'll let
+                 * somebody else test it.
+                 */
+                writel(0x5, ORION5X_SATA_VIRT_BASE | 0x2c);
+                break;
+        }
 }
 
 /* Warning: D-Link uses a wrong mach-type (=526) in their bootloader */