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Diffstat (limited to 'arch/avr32/boards/hammerhead/flash.c')
-rw-r--r--arch/avr32/boards/hammerhead/flash.c377
1 files changed, 377 insertions, 0 deletions
diff --git a/arch/avr32/boards/hammerhead/flash.c b/arch/avr32/boards/hammerhead/flash.c
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index 0000000..a98c6dd
--- /dev/null
+++ b/arch/avr32/boards/hammerhead/flash.c
@@ -0,0 +1,377 @@
+/*
+ * Hammerhead board-specific flash initialization
+ *
+ * Copyright (C) 2008 Miromico AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+#include <linux/usb/isp116x.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+
+#include <mach/portmux.h>
+#include <mach/at32ap700x.h>
+#include <mach/smc.h>
+
+#include "../../mach-at32ap/clock.h"
+#include "flash.h"
+
+
+#define HAMMERHEAD_USB_PERIPH_GCLK0 0x40000000
+#define HAMMERHEAD_USB_PERIPH_CS2 0x02000000
+#define HAMMERHEAD_USB_PERIPH_EXTINT0 0x02000000
+
+#define HAMMERHEAD_FPGA_PERIPH_MOSI 0x00000002
+#define HAMMERHEAD_FPGA_PERIPH_SCK 0x00000020
+#define HAMMERHEAD_FPGA_PERIPH_EXTINT3 0x10000000
+
+static struct smc_timing flash_timing __initdata = {
+ .ncs_read_setup = 0,
+ .nrd_setup = 40,
+ .ncs_write_setup = 0,
+ .nwe_setup = 10,
+
+ .ncs_read_pulse = 80,
+ .nrd_pulse = 40,
+ .ncs_write_pulse = 65,
+ .nwe_pulse = 55,
+
+ .read_cycle = 120,
+ .write_cycle = 120,
+};
+
+static struct smc_config flash_config __initdata = {
+ .bus_width = 2,
+ .nrd_controlled = 1,
+ .nwe_controlled = 1,
+ .byte_write = 1,
+};
+
+static struct mtd_partition flash_parts[] = {
+ {
+ .name = "u-boot",
+ .offset = 0x00000000,
+ .size = 0x00020000, /* 128 KiB */
+ .mask_flags = MTD_WRITEABLE,
+ },
+ {
+ .name = "root",
+ .offset = 0x00020000,
+ .size = 0x007d0000,
+ },
+ {
+ .name = "env",
+ .offset = 0x007f0000,
+ .size = 0x00010000,
+ .mask_flags = MTD_WRITEABLE,
+ },
+};
+
+static struct physmap_flash_data flash_data = {
+ .width = 2,
+ .nr_parts = ARRAY_SIZE(flash_parts),
+ .parts = flash_parts,
+};
+
+static struct resource flash_resource = {
+ .start = 0x00000000,
+ .end = 0x007fffff,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device flash_device = {
+ .name = "physmap-flash",
+ .id = 0,
+ .resource = &flash_resource,
+ .num_resources = 1,
+ .dev = { .platform_data = &flash_data, },
+};
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_USB
+
+static struct smc_timing isp1160_timing __initdata = {
+ .ncs_read_setup = 75,
+ .nrd_setup = 75,
+ .ncs_write_setup = 75,
+ .nwe_setup = 75,
+
+
+ /* We use conservative timing settings, as the minimal settings aren't
+ stable. There may be room for tweaking. */
+ .ncs_read_pulse = 75, /* min. 33ns */
+ .nrd_pulse = 75, /* min. 33ns */
+ .ncs_write_pulse = 75, /* min. 26ns */
+ .nwe_pulse = 75, /* min. 26ns */
+
+ .read_cycle = 225, /* min. 143ns */
+ .write_cycle = 225, /* min. 136ns */
+};
+
+static struct smc_config isp1160_config __initdata = {
+ .bus_width = 2,
+ .nrd_controlled = 1,
+ .nwe_controlled = 1,
+ .byte_write = 0,
+};
+
+/*
+ * The platform delay function is only used to enforce the strange
+ * read to write delay. This can not be configured in the SMC. All other
+ * timings are controlled by the SMC (see timings obove)
+ * So in isp116x-hcd.c we should comment out USE_PLATFORM_DELAY
+ */
+void isp116x_delay(struct device *dev, int delay)
+{
+ if (delay > 150)
+ ndelay(delay - 150);
+}
+
+static struct isp116x_platform_data isp1160_data = {
+ .sel15Kres = 1, /* use internal downstream resistors */
+ .oc_enable = 0, /* external overcurrent detection */
+ .int_edge_triggered = 0, /* interrupt is level triggered */
+ .int_act_high = 0, /* interrupt is active low */
+ .delay = isp116x_delay, /* platform delay function */
+};
+
+static struct resource isp1160_resource[] = {
+ {
+ .start = 0x08000000,
+ .end = 0x08000001,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = 0x08000002,
+ .end = 0x08000003,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = 64,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static struct platform_device isp1160_device = {
+ .name = "isp116x-hcd",
+ .id = 0,
+ .resource = isp1160_resource,
+ .num_resources = 3,
+ .dev = {
+ .platform_data = &isp1160_data,
+ },
+};
+#endif
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_USB
+static int __init hammerhead_usbh_init(void)
+{
+ struct clk *gclk;
+ struct clk *osc;
+
+ int ret;
+
+ /* setup smc for usbh */
+ smc_set_timing(&isp1160_config, &isp1160_timing);
+ ret = smc_set_configuration(2, &isp1160_config);
+
+ if (ret < 0) {
+ printk(KERN_ERR
+ "hammerhead: failed to set ISP1160 USBH timing\n");
+ return ret;
+ }
+
+ /* setup gclk0 to run from osc1 */
+ gclk = clk_get(NULL, "gclk0");
+ if (IS_ERR(gclk))
+ goto err_gclk;
+
+ osc = clk_get(NULL, "osc1");
+ if (IS_ERR(osc))
+ goto err_osc;
+
+ if (clk_set_parent(gclk, osc)) {
+ pr_debug("hammerhead: failed to set osc1 for USBH clock\n");
+ goto err_set_clk;
+ }
+
+ /* set clock to 6MHz */
+ clk_set_rate(gclk, 6000000);
+
+ /* and enable */
+ clk_enable(gclk);
+
+ /* select GCLK0 peripheral function */
+ at32_select_periph(GPIO_PIOA_BASE, HAMMERHEAD_USB_PERIPH_GCLK0,
+ GPIO_PERIPH_A, 0);
+
+ /* enable CS2 peripheral function */
+ at32_select_periph(GPIO_PIOE_BASE, HAMMERHEAD_USB_PERIPH_CS2,
+ GPIO_PERIPH_A, 0);
+
+ /* H_WAKEUP must be driven low */
+ at32_select_gpio(GPIO_PIN_PA(8), AT32_GPIOF_OUTPUT);
+
+ /* Select EXTINT0 for PB25 */
+ at32_select_periph(GPIO_PIOB_BASE, HAMMERHEAD_USB_PERIPH_EXTINT0,
+ GPIO_PERIPH_A, 0);
+
+ /* register usbh device driver */
+ platform_device_register(&isp1160_device);
+
+ err_set_clk:
+ clk_put(osc);
+ err_osc:
+ clk_put(gclk);
+ err_gclk:
+ return ret;
+}
+#endif
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_FPGA
+static struct smc_timing fpga_timing __initdata = {
+ .ncs_read_setup = 16,
+ .nrd_setup = 32,
+ .ncs_read_pulse = 48,
+ .nrd_pulse = 32,
+ .read_cycle = 64,
+
+ .ncs_write_setup = 16,
+ .nwe_setup = 16,
+ .ncs_write_pulse = 32,
+ .nwe_pulse = 32,
+ .write_cycle = 64,
+};
+
+static struct smc_config fpga_config __initdata = {
+ .bus_width = 4,
+ .nrd_controlled = 1,
+ .nwe_controlled = 1,
+ .byte_write = 0,
+};
+
+static struct resource hh_fpga0_resource[] = {
+ {
+ .start = 0xffe00400,
+ .end = 0xffe00400 + 0x3ff,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = 4,
+ .end = 4,
+ .flags = IORESOURCE_IRQ,
+ },
+ {
+ .start = 0x0c000000,
+ .end = 0x0c000100,
+ .flags = IORESOURCE_MEM,
+ },
+ {
+ .start = 67,
+ .end = 67,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static u64 hh_fpga0_dma_mask = DMA_32BIT_MASK;
+static struct platform_device hh_fpga0_device = {
+ .name = "hh_fpga",
+ .id = 0,
+ .dev = {
+ .dma_mask = &hh_fpga0_dma_mask,
+ .coherent_dma_mask = DMA_32BIT_MASK,
+ },
+ .resource = hh_fpga0_resource,
+ .num_resources = ARRAY_SIZE(hh_fpga0_resource),
+};
+
+static struct clk hh_fpga0_spi_clk = {
+ .name = "spi_clk",
+ .dev = &hh_fpga0_device.dev,
+ .mode = pba_clk_mode,
+ .get_rate = pba_clk_get_rate,
+ .index = 1,
+};
+
+struct platform_device *__init at32_add_device_hh_fpga(void)
+{
+ /* Select peripheral functionallity for SPI SCK and MOSI */
+ at32_select_periph(GPIO_PIOB_BASE, HAMMERHEAD_FPGA_PERIPH_SCK,
+ GPIO_PERIPH_B, 0);
+ at32_select_periph(GPIO_PIOB_BASE, HAMMERHEAD_FPGA_PERIPH_MOSI,
+ GPIO_PERIPH_B, 0);
+
+ /* reserve all other needed gpio
+ * We have on board pull ups, so there is no need
+ * to enable gpio pull ups */
+ /* INIT_DONE (input) */
+ at32_select_gpio(GPIO_PIN_PB(0), 0);
+
+ /* nSTATUS (input) */
+ at32_select_gpio(GPIO_PIN_PB(2), 0);
+
+ /* nCONFIG (output, low) */
+ at32_select_gpio(GPIO_PIN_PB(3), AT32_GPIOF_OUTPUT);
+
+ /* CONF_DONE (input) */
+ at32_select_gpio(GPIO_PIN_PB(4), 0);
+
+ /* Select EXTINT3 for PB28 (Interrupt from FPGA) */
+ at32_select_periph(GPIO_PIOB_BASE, HAMMERHEAD_FPGA_PERIPH_EXTINT3,
+ GPIO_PERIPH_A, 0);
+
+ /* Get our parent clock */
+ hh_fpga0_spi_clk.parent = clk_get(NULL, "pba");
+ clk_put(hh_fpga0_spi_clk.parent);
+
+ /* Register clock in at32 clock tree */
+ at32_clk_register(&hh_fpga0_spi_clk);
+
+ platform_device_register(&hh_fpga0_device);
+ return &hh_fpga0_device;
+}
+#endif
+
+/* This needs to be called after the SMC has been initialized */
+static int __init hammerhead_flash_init(void)
+{
+ int ret;
+
+ smc_set_timing(&flash_config, &flash_timing);
+ ret = smc_set_configuration(0, &flash_config);
+
+ if (ret < 0) {
+ printk(KERN_ERR "hammerhead: failed to set NOR flash timing\n");
+ return ret;
+ }
+
+ platform_device_register(&flash_device);
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_USB
+ hammerhead_usbh_init();
+#endif
+
+#ifdef CONFIG_BOARD_HAMMERHEAD_FPGA
+ /* Setup SMC for FPGA interface */
+ smc_set_timing(&fpga_config, &fpga_timing);
+ ret = smc_set_configuration(3, &fpga_config);
+#endif
+
+
+ if (ret < 0) {
+ printk(KERN_ERR "hammerhead: failed to set FPGA timing\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+device_initcall(hammerhead_flash_init);