47acde1672
Generic gpmc timing calculation helper is available now, use it instead of custom timing calculation. Signed-off-by: Afzal Mohammed <afzal@ti.com>
259 lines
6.1 KiB
C
259 lines
6.1 KiB
C
/*
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* linux/arch/arm/mach-omap2/usb-tusb6010.c
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*
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* Copyright (C) 2006 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/delay.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/export.h>
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#include <linux/platform_data/usb-omap.h>
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#include <linux/usb/musb.h>
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#include "gpmc.h"
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#include "mux.h"
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static u8 async_cs, sync_cs;
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static unsigned refclk_psec;
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/* NOTE: timings are from tusb 6010 datasheet Rev 1.8, 12-Sept 2006 */
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static int tusb_set_async_mode(unsigned sysclk_ps)
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{
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struct gpmc_device_timings dev_t;
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struct gpmc_timings t;
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unsigned t_acsnh_advnh = sysclk_ps + 3000;
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memset(&dev_t, 0, sizeof(dev_t));
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dev_t.mux = true;
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dev_t.t_ceasu = 8 * 1000;
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dev_t.t_avdasu = t_acsnh_advnh - 7000;
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dev_t.t_ce_avd = 1000;
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dev_t.t_avdp_r = t_acsnh_advnh;
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dev_t.t_oeasu = t_acsnh_advnh + 1000;
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dev_t.t_oe = 300;
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dev_t.t_cez_r = 7000;
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dev_t.t_cez_w = dev_t.t_cez_r;
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dev_t.t_avdp_w = t_acsnh_advnh;
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dev_t.t_weasu = t_acsnh_advnh + 1000;
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dev_t.t_wpl = 300;
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dev_t.cyc_aavdh_we = 1;
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gpmc_calc_timings(&t, &dev_t);
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return gpmc_cs_set_timings(async_cs, &t);
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}
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static int tusb_set_sync_mode(unsigned sysclk_ps)
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{
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struct gpmc_device_timings dev_t;
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struct gpmc_timings t;
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unsigned t_scsnh_advnh = sysclk_ps + 3000;
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memset(&dev_t, 0, sizeof(dev_t));
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dev_t.mux = true;
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dev_t.sync_read = true;
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dev_t.sync_write = true;
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dev_t.clk = 11100;
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dev_t.t_bacc = 1000;
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dev_t.t_ces = 1000;
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dev_t.t_ceasu = 8 * 1000;
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dev_t.t_avdasu = t_scsnh_advnh - 7000;
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dev_t.t_ce_avd = 1000;
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dev_t.t_avdp_r = t_scsnh_advnh;
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dev_t.cyc_aavdh_oe = 3;
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dev_t.cyc_oe = 5;
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dev_t.t_ce_rdyz = 7000;
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dev_t.t_avdp_w = t_scsnh_advnh;
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dev_t.cyc_aavdh_we = 3;
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dev_t.cyc_wpl = 6;
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dev_t.t_ce_rdyz = 7000;
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gpmc_calc_timings(&t, &dev_t);
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return gpmc_cs_set_timings(sync_cs, &t);
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}
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/* tusb driver calls this when it changes the chip's clocking */
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int tusb6010_platform_retime(unsigned is_refclk)
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{
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static const char error[] =
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KERN_ERR "tusb6010 %s retime error %d\n";
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unsigned sysclk_ps;
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int status;
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if (!refclk_psec)
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return -ENODEV;
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sysclk_ps = is_refclk ? refclk_psec : TUSB6010_OSCCLK_60;
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status = tusb_set_async_mode(sysclk_ps);
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if (status < 0) {
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printk(error, "async", status);
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goto done;
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}
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status = tusb_set_sync_mode(sysclk_ps);
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if (status < 0)
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printk(error, "sync", status);
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done:
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return status;
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}
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EXPORT_SYMBOL_GPL(tusb6010_platform_retime);
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static struct resource tusb_resources[] = {
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/* Order is significant! The start/end fields
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* are updated during setup..
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*/
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{ /* Asynchronous access */
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.flags = IORESOURCE_MEM,
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},
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{ /* Synchronous access */
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.flags = IORESOURCE_MEM,
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},
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{ /* IRQ */
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.name = "mc",
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.flags = IORESOURCE_IRQ,
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},
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};
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static u64 tusb_dmamask = ~(u32)0;
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static struct platform_device tusb_device = {
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.name = "musb-tusb",
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.id = -1,
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.dev = {
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.dma_mask = &tusb_dmamask,
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.coherent_dma_mask = 0xffffffff,
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},
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.num_resources = ARRAY_SIZE(tusb_resources),
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.resource = tusb_resources,
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};
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/* this may be called only from board-*.c setup code */
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int __init
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tusb6010_setup_interface(struct musb_hdrc_platform_data *data,
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unsigned ps_refclk, unsigned waitpin,
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unsigned async, unsigned sync,
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unsigned irq, unsigned dmachan)
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{
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int status;
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static char error[] __initdata =
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KERN_ERR "tusb6010 init error %d, %d\n";
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/* ASYNC region, primarily for PIO */
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status = gpmc_cs_request(async, SZ_16M, (unsigned long *)
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&tusb_resources[0].start);
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if (status < 0) {
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printk(error, 1, status);
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return status;
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}
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tusb_resources[0].end = tusb_resources[0].start + 0x9ff;
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async_cs = async;
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gpmc_cs_write_reg(async, GPMC_CS_CONFIG1,
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GPMC_CONFIG1_PAGE_LEN(2)
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| GPMC_CONFIG1_WAIT_READ_MON
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| GPMC_CONFIG1_WAIT_WRITE_MON
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| GPMC_CONFIG1_WAIT_PIN_SEL(waitpin)
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| GPMC_CONFIG1_READTYPE_ASYNC
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| GPMC_CONFIG1_WRITETYPE_ASYNC
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| GPMC_CONFIG1_DEVICESIZE_16
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| GPMC_CONFIG1_DEVICETYPE_NOR
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| GPMC_CONFIG1_MUXADDDATA);
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/* SYNC region, primarily for DMA */
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status = gpmc_cs_request(sync, SZ_16M, (unsigned long *)
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&tusb_resources[1].start);
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if (status < 0) {
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printk(error, 2, status);
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return status;
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}
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tusb_resources[1].end = tusb_resources[1].start + 0x9ff;
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sync_cs = sync;
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gpmc_cs_write_reg(sync, GPMC_CS_CONFIG1,
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GPMC_CONFIG1_READMULTIPLE_SUPP
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| GPMC_CONFIG1_READTYPE_SYNC
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| GPMC_CONFIG1_WRITEMULTIPLE_SUPP
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| GPMC_CONFIG1_WRITETYPE_SYNC
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| GPMC_CONFIG1_PAGE_LEN(2)
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| GPMC_CONFIG1_WAIT_READ_MON
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| GPMC_CONFIG1_WAIT_WRITE_MON
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| GPMC_CONFIG1_WAIT_PIN_SEL(waitpin)
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| GPMC_CONFIG1_DEVICESIZE_16
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| GPMC_CONFIG1_DEVICETYPE_NOR
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| GPMC_CONFIG1_MUXADDDATA
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/* fclk divider gets set later */
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);
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/* IRQ */
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status = gpio_request_one(irq, GPIOF_IN, "TUSB6010 irq");
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if (status < 0) {
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printk(error, 3, status);
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return status;
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}
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tusb_resources[2].start = gpio_to_irq(irq);
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/* set up memory timings ... can speed them up later */
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if (!ps_refclk) {
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printk(error, 4, status);
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return -ENODEV;
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}
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refclk_psec = ps_refclk;
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status = tusb6010_platform_retime(1);
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if (status < 0) {
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printk(error, 5, status);
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return status;
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}
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/* finish device setup ... */
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if (!data) {
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printk(error, 6, status);
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return -ENODEV;
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}
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tusb_device.dev.platform_data = data;
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/* REVISIT let the driver know what DMA channels work */
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if (!dmachan)
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tusb_device.dev.dma_mask = NULL;
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else {
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/* assume OMAP 2420 ES2.0 and later */
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if (dmachan & (1 << 0))
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omap_mux_init_signal("sys_ndmareq0", 0);
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if (dmachan & (1 << 1))
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omap_mux_init_signal("sys_ndmareq1", 0);
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if (dmachan & (1 << 2))
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omap_mux_init_signal("sys_ndmareq2", 0);
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if (dmachan & (1 << 3))
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omap_mux_init_signal("sys_ndmareq3", 0);
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if (dmachan & (1 << 4))
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omap_mux_init_signal("sys_ndmareq4", 0);
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if (dmachan & (1 << 5))
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omap_mux_init_signal("sys_ndmareq5", 0);
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}
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/* so far so good ... register the device */
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status = platform_device_register(&tusb_device);
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if (status < 0) {
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printk(error, 7, status);
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return status;
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}
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return 0;
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}
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