--- /dev/null
+/*
+ * linux/arch/arm/mach-omap2/usb-tusb6010.c
+ *
+ * Copyright (C) 2006 Nokia Corporation
+ *
+ * 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/err.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/gpio.h>
+#include <linux/export.h>
+#include <linux/platform_data/usb-omap.h>
+
+#include <linux/usb/musb.h>
+
+#include "gpmc.h"
+
+#include "mux.h"
+
+static u8 async_cs, sync_cs;
+static unsigned refclk_psec;
+
+static struct gpmc_settings tusb_async = {
+ .wait_on_read = true,
+ .wait_on_write = true,
+ .device_width = GPMC_DEVWIDTH_16BIT,
+ .mux_add_data = GPMC_MUX_AD,
+};
+
+static struct gpmc_settings tusb_sync = {
+ .burst_read = true,
+ .burst_write = true,
+ .sync_read = true,
+ .sync_write = true,
+ .wait_on_read = true,
+ .wait_on_write = true,
+ .burst_len = GPMC_BURST_16,
+ .device_width = GPMC_DEVWIDTH_16BIT,
+ .mux_add_data = GPMC_MUX_AD,
+};
+
+/* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
+
+static int tusb_set_async_mode(unsigned sysclk_ps)
+{
+ struct gpmc_device_timings dev_t;
+ struct gpmc_timings t;
+ unsigned t_acsnh_advnh = sysclk_ps + 3000;
+
+ memset(&dev_t, 0, sizeof(dev_t));
+
+ dev_t.t_ceasu = 8 * 1000;
+ dev_t.t_avdasu = t_acsnh_advnh - 7000;
+ dev_t.t_ce_avd = 1000;
+ dev_t.t_avdp_r = t_acsnh_advnh;
+ dev_t.t_oeasu = t_acsnh_advnh + 1000;
+ dev_t.t_oe = 300;
+ dev_t.t_cez_r = 7000;
+ dev_t.t_cez_w = dev_t.t_cez_r;
+ dev_t.t_avdp_w = t_acsnh_advnh;
+ dev_t.t_weasu = t_acsnh_advnh + 1000;
+ dev_t.t_wpl = 300;
+ dev_t.cyc_aavdh_we = 1;
+
+ gpmc_calc_timings(&t, &tusb_async, &dev_t);
+
+ return gpmc_cs_set_timings(async_cs, &t, &tusb_async);
+}
+
+static int tusb_set_sync_mode(unsigned sysclk_ps)
+{
+ struct gpmc_device_timings dev_t;
+ struct gpmc_timings t;
+ unsigned t_scsnh_advnh = sysclk_ps + 3000;
+
+ memset(&dev_t, 0, sizeof(dev_t));
+
+ dev_t.clk = 11100;
+ dev_t.t_bacc = 1000;
+ dev_t.t_ces = 1000;
+ dev_t.t_ceasu = 8 * 1000;
+ dev_t.t_avdasu = t_scsnh_advnh - 7000;
+ dev_t.t_ce_avd = 1000;
+ dev_t.t_avdp_r = t_scsnh_advnh;
+ dev_t.cyc_aavdh_oe = 3;
+ dev_t.cyc_oe = 5;
+ dev_t.t_ce_rdyz = 7000;
+ dev_t.t_avdp_w = t_scsnh_advnh;
+ dev_t.cyc_aavdh_we = 3;
+ dev_t.cyc_wpl = 6;
+
+ gpmc_calc_timings(&t, &tusb_sync, &dev_t);
+
+ return gpmc_cs_set_timings(sync_cs, &t, &tusb_sync);
+}
+
+/* tusb driver calls this when it changes the chip's clocking */
+int tusb6010_platform_retime(unsigned is_refclk)
+{
+ static const char error[] =
+ KERN_ERR "tusb6010 %s retime error %d\n";
+
+ unsigned sysclk_ps;
+ int status;
+
+ if (!refclk_psec)
+ return -ENODEV;
+
+ sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
+
+ status = tusb_set_async_mode(sysclk_ps);
+ if (status < 0) {
+ printk(error, "async", status);
+ goto done;
+ }
+ status = tusb_set_sync_mode(sysclk_ps);
+ if (status < 0)
+ printk(error, "sync", status);
+done:
+ return status;
+}
+EXPORT_SYMBOL_GPL(tusb6010_platform_retime);
+
+static struct resource tusb_resources[] = {
+ /* Order is significant! The start/end fields
+ * are updated during setup..
+ */
+ { /* Asynchronous access */
+ .flags = IORESOURCE_MEM,
+ },
+ { /* Synchronous access */
+ .flags = IORESOURCE_MEM,
+ },
+ { /* IRQ */
+ .name = "mc",
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+static u64 tusb_dmamask = ~(u32)0;
+
+static struct platform_device tusb_device = {
+ .name = "musb-tusb",
+ .id = -1,
+ .dev = {
+ .dma_mask = &tusb_dmamask,
+ .coherent_dma_mask = 0xffffffff,
+ },
+ .num_resources = ARRAY_SIZE(tusb_resources),
+ .resource = tusb_resources,
+};
+
+
+/* this may be called only from board-*.c setup code */
+int __init
+tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
+ unsigned ps_refclk, unsigned waitpin,
+ unsigned async, unsigned sync,
+ unsigned irq, unsigned dmachan)
+{
+ int status;
+ static char error[] __initdata =
+ KERN_ERR "tusb6010 init error %d, %d\n";
+
+ /* ASYNC region, primarily for PIO */
+ status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
+ &tusb_resources[0].start);
+ if (status < 0) {
+ printk(error, 1, status);
+ return status;
+ }
+ tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
+ tusb_async.wait_pin = waitpin;
+ async_cs = async;
+
+ status = gpmc_cs_program_settings(async_cs, &tusb_async);
+ if (status < 0)
+ return status;
+
+ /* SYNC region, primarily for DMA */
+ status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
+ &tusb_resources[1].start);
+ if (status < 0) {
+ printk(error, 2, status);
+ return status;
+ }
+ tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
+ tusb_sync.wait_pin = waitpin;
+ sync_cs = sync;
+
+ status = gpmc_cs_program_settings(sync_cs, &tusb_sync);
+ if (status < 0)
+ return status;
+
+ /* IRQ */
+ status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
+ if (status < 0) {
+ printk(error, 3, status);
+ return status;
+ }
+ tusb_resources[2].start = gpio_to_irq(irq);
+
+ /* set up memory timings ... can speed them up later */
+ if (!ps_refclk) {
+ printk(error, 4, status);
+ return -ENODEV;
+ }
+ refclk_psec = ps_refclk;
+ status = tusb6010_platform_retime(1);
+ if (status < 0) {
+ printk(error, 5, status);
+ return status;
+ }
+
+ /* finish device setup ... */
+ if (!data) {
+ printk(error, 6, status);
+ return -ENODEV;
+ }
+ tusb_device.dev.platform_data = data;
+
+ /* REVISIT let the driver know what DMA channels work */
+ if (!dmachan)
+ tusb_device.dev.dma_mask = NULL;
+ else {
+ /* assume OMAP 2420 ES2.0 and later */
+ if (dmachan & (1 << 0))
+ omap_mux_init_signal("sys_ndmareq0", 0);
+ if (dmachan & (1 << 1))
+ omap_mux_init_signal("sys_ndmareq1", 0);
+ if (dmachan & (1 << 2))
+ omap_mux_init_signal("sys_ndmareq2", 0);
+ if (dmachan & (1 << 3))
+ omap_mux_init_signal("sys_ndmareq3", 0);
+ if (dmachan & (1 << 4))
+ omap_mux_init_signal("sys_ndmareq4", 0);
+ if (dmachan & (1 << 5))
+ omap_mux_init_signal("sys_ndmareq5", 0);
+ }
+
+ /* so far so good ... register the device */
+ status = platform_device_register(&tusb_device);
+ if (status < 0) {
+ printk(error, 7, status);
+ return status;
+ }
+ return 0;
+}
Code Review / kvmfornfv.git / blobdiff