xtensa: s6105 specific configuration for s6gmac

Platform-specific configuration for the s6gmac driver, including the
PHY interrupt line.

Signed-off-by: Daniel Glockner <dg@emlix.com>
Signed-off-by: Oskar Schirmer <os@emlix.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Johannes Weiner <jw@emlix.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2 files changed, 100 insertions, 0 deletions

diff --git a/arch/xtensa/platforms/s6105/device.c b/arch/xtensa/platforms/s6105/device.c
index 78b08be5a92d..963634a3463d 100644
--- a/arch/xtensa/platforms/s6105/device.c
+++ b/arch/xtensa/platforms/s6105/device.c
@@ -5,14 +5,27 @@
  */
 
 #include <linux/kernel.h>
+#include <linux/gpio.h>
 #include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/phy.h>
 #include <linux/platform_device.h>
 #include <linux/serial.h>
 #include <linux/serial_8250.h>
 
 #include <variant/hardware.h>
+#include <variant/dmac.h>
 
+#include <platform/gpio.h>
+
+#define GPIO3_INTNUM            3
 #define UART_INTNUM             4
+#define GMAC_INTNUM             5
+
+static const signed char gpio3_irq_mappings[] = {
+        S6_INTC_GPIO(3),
+        -1
+};
 
 static const signed char uart_irq_mappings[] = {
         S6_INTC_UART(0),
@@ -20,8 +33,18 @@ static const signed char uart_irq_mappings[] = {
         -1,
 };
 
+static const signed char gmac_irq_mappings[] = {
+        S6_INTC_GMAC_STAT,
+        S6_INTC_GMAC_ERR,
+        S6_INTC_DMA_HOSTTERMCNT(0),
+        S6_INTC_DMA_HOSTTERMCNT(1),
+        -1
+};
+
 const signed char *platform_irq_mappings[NR_IRQS] = {
+        [GPIO3_INTNUM] = gpio3_irq_mappings,
         [UART_INTNUM] = uart_irq_mappings,
+        [GMAC_INTNUM] = gmac_irq_mappings,
 };
 
 static struct plat_serial8250_port serial_platform_data[] = {
@@ -46,6 +69,66 @@ static struct plat_serial8250_port serial_platform_data[] = {
         { },
 };
 
+static struct resource s6_gmac_resource[] = {
+        {
+                .name   = "mem",
+                .start  = (resource_size_t)S6_REG_GMAC,
+                .end    = (resource_size_t)S6_REG_GMAC + 0x10000 - 1,
+                .flags  = IORESOURCE_MEM,
+        },
+        {
+                .name   = "dma",
+                .start  = (resource_size_t)
+                        DMA_CHNL(S6_REG_HIFDMA, S6_HIFDMA_GMACTX),
+                .end    = (resource_size_t)
+                        DMA_CHNL(S6_REG_HIFDMA, S6_HIFDMA_GMACTX) + 0x100 - 1,
+                .flags  = IORESOURCE_DMA,
+        },
+        {
+                .name   = "dma",
+                .start  = (resource_size_t)
+                        DMA_CHNL(S6_REG_HIFDMA, S6_HIFDMA_GMACRX),
+                .end    = (resource_size_t)
+                        DMA_CHNL(S6_REG_HIFDMA, S6_HIFDMA_GMACRX) + 0x100 - 1,
+                .flags  = IORESOURCE_DMA,
+        },
+        {
+                .name   = "io",
+                .start  = (resource_size_t)S6_MEM_GMAC,
+                .end    = (resource_size_t)S6_MEM_GMAC + 0x2000000 - 1,
+                .flags  = IORESOURCE_IO,
+        },
+        {
+                .name   = "irq",
+                .start  = (resource_size_t)GMAC_INTNUM,
+                .flags  = IORESOURCE_IRQ,
+        },
+        {
+                .name   = "irq",
+                .start  = (resource_size_t)PHY_POLL,
+                .flags  = IORESOURCE_IRQ,
+        },
+};
+
+static int __init prepare_phy_irq(int pin)
+{
+        int irq;
+        if (gpio_request(pin, "s6gmac_phy") < 0)
+                goto fail;
+        if (gpio_direction_input(pin) < 0)
+                goto free;
+        irq = gpio_to_irq(pin);
+        if (irq < 0)
+                goto free;
+        if (set_irq_type(irq, IRQ_TYPE_LEVEL_LOW) < 0)
+                goto free;
+        return irq;
+free:
+        gpio_free(pin);
+fail:
+        return PHY_POLL;
+}
+
 static struct platform_device platform_devices[] = {
         {
                 .name = "serial8250",
@@ -54,12 +137,20 @@ static struct platform_device platform_devices[] = {
                         .platform_data = serial_platform_data,
                 },
         },
+        {
+                .name = "s6gmac",
+                .id = 0,
+                .resource = s6_gmac_resource,
+                .num_resources = ARRAY_SIZE(s6_gmac_resource),
+        },
 };
 
 static int __init device_init(void)
 {
         int i;
 
+        s6_gmac_resource[5].start = prepare_phy_irq(GPIO_PHY_IRQ);
+
         for (i = 0; i < ARRAY_SIZE(platform_devices); i++)
                 platform_device_register(&platform_devices[i]);
         return 0;
diff --git a/arch/xtensa/platforms/s6105/setup.c b/arch/xtensa/platforms/s6105/setup.c
index 95fa23c8e632..86ce730f7913 100644
--- a/arch/xtensa/platforms/s6105/setup.c
+++ b/arch/xtensa/platforms/s6105/setup.c
@@ -35,12 +35,21 @@ void __init platform_setup(char **cmdline)
 {
         unsigned long reg;
 
+        reg = readl(S6_REG_GREG1 + S6_GREG1_PLLSEL);
+        reg &= ~(S6_GREG1_PLLSEL_GMAC_MASK << S6_GREG1_PLLSEL_GMAC |
+                S6_GREG1_PLLSEL_GMII_MASK << S6_GREG1_PLLSEL_GMII);
+        reg |= S6_GREG1_PLLSEL_GMAC_125MHZ << S6_GREG1_PLLSEL_GMAC |
+                S6_GREG1_PLLSEL_GMII_125MHZ << S6_GREG1_PLLSEL_GMII;
+        writel(reg, S6_REG_GREG1 + S6_GREG1_PLLSEL);
+
         reg = readl(S6_REG_GREG1 + S6_GREG1_CLKGATE);
         reg &= ~(1 << S6_GREG1_BLOCK_SB);
+        reg &= ~(1 << S6_GREG1_BLOCK_GMAC);
         writel(reg, S6_REG_GREG1 + S6_GREG1_CLKGATE);
 
         reg = readl(S6_REG_GREG1 + S6_GREG1_BLOCKENA);
         reg |= 1 << S6_GREG1_BLOCK_SB;
+        reg |= 1 << S6_GREG1_BLOCK_GMAC;
         writel(reg, S6_REG_GREG1 + S6_GREG1_BLOCKENA);
 
         printk(KERN_NOTICE "S6105 on Stretch S6000 - "