+++ /dev/null
-/*
- * Copyright (C) 2007 Openmoko, Inc.
- * Author: Harald Welte <laforge@openmoko.org>
- *
- * Smedia Glamo GPIO based SPI driver
- *
- * 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.
- *
- * This driver currently only implements a minimum subset of the hardware
- * features, esp. those features that are required to drive the jbt6k74
- * LCM controller asic in the TD028TTEC1 LCM.
- *
-*/
-
-#define DEBUG
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/spinlock.h>
-#include <linux/platform_device.h>
-
-#include <linux/spi/spi.h>
-#include <linux/spi/spi_bitbang.h>
-#include <linux/spi/glamo.h>
-
-#include <linux/glamofb.h>
-
-#include <mach/hardware.h>
-
-#include "glamo-core.h"
-#include "glamo-regs.h"
-
-struct glamo_spigpio {
- struct spi_bitbang bitbang;
- struct spi_master *master;
- struct glamo_spigpio_platform_data *info;
-};
-
-static inline struct glamo_spigpio *to_sg(struct spi_device *spi)
-{
- return dev_get_drvdata(&spi->master->dev);
-}
-
-static inline void setsck(struct spi_device *dev, int on)
-{
- struct glamo_spigpio *sg = to_sg(dev);
- glamo_gpio_setpin(sg->info->core, sg->info->pin_clk, on ? 1 : 0);
-}
-
-static inline void setmosi(struct spi_device *dev, int on)
-{
- struct glamo_spigpio *sg = to_sg(dev);
- glamo_gpio_setpin(sg->info->core, sg->info->pin_mosi, on ? 1 : 0);
-}
-
-static inline u32 getmiso(struct spi_device *dev)
-{
- struct glamo_spigpio *sg = to_sg(dev);
- if (sg->info->pin_miso)
- return glamo_gpio_getpin(sg->info->core, sg->info->pin_miso) ? 1 : 0;
- else
- return 0;
-}
-
-#define spidelay(x) ndelay(x)
-
-#define EXPAND_BITBANG_TXRX
-#include <linux/spi/spi_bitbang.h>
-
-static u32 glamo_spigpio_txrx_mode0(struct spi_device *spi,
- unsigned nsecs, u32 word, u8 bits)
-{
- return bitbang_txrx_be_cpha0(spi, nsecs, 0, word, bits);
-}
-
-static u32 glamo_spigpio_txrx_mode1(struct spi_device *spi,
- unsigned nsecs, u32 word, u8 bits)
-{
- return bitbang_txrx_be_cpha1(spi, nsecs, 0, word, bits);
-}
-
-static u32 glamo_spigpio_txrx_mode2(struct spi_device *spi,
- unsigned nsecs, u32 word, u8 bits)
-{
- return bitbang_txrx_be_cpha0(spi, nsecs, 1, word, bits);
-}
-
-static u32 glamo_spigpio_txrx_mode3(struct spi_device *spi,
- unsigned nsecs, u32 word, u8 bits)
-{
- return bitbang_txrx_be_cpha1(spi, nsecs, 1, word, bits);
-}
-
-
-#if 0
-static int glamo_spigpio_setupxfer(struct spi_device *spi,
- struct spi_transfer *t)
-{
- struct glamo_spi *gs = to_sg(spi);
- unsigned int bpw;
-
- bpw = t ? t->bits_per_word : spi->bits_per_word;
-
- if (bpw != 9 && bpw != 8) {
- dev_err(&spi->dev, "invalid bits-per-word (%d)\n", bpw);
- return -EINVAL;
- }
-
- return 0;
-}
-#endif
-
-static void glamo_spigpio_chipsel(struct spi_device *spi, int value)
-{
- struct glamo_spigpio *gs = to_sg(spi);
-#if 0
- dev_dbg(&spi->dev, "chipsel %d: spi=%p, gs=%p, info=%p, handle=%p\n",
- value, spi, gs, gs->info, gs->info->glamo);
-#endif
- glamo_gpio_setpin(gs->info->core, gs->info->pin_cs, value ? 0 : 1);
-}
-
-
-static int glamo_spigpio_probe(struct platform_device *pdev)
-{
- struct spi_master *master;
- struct glamo_spigpio *sp;
- int ret;
-
- master = spi_alloc_master(&pdev->dev, sizeof(struct glamo_spigpio));
- if (master == NULL) {
- dev_err(&pdev->dev, "failed to allocate spi master\n");
- ret = -ENOMEM;
- goto err;
- }
-
- sp = spi_master_get_devdata(master);
- platform_set_drvdata(pdev, sp);
- sp->info = pdev->dev.platform_data;
- if (!sp->info) {
- dev_err(&pdev->dev, "can't operate without platform data\n");
- ret = -EIO;
- goto err_no_pdev;
- }
-
- master->num_chipselect = 1;
- master->bus_num = 2; /* FIXME: use dynamic number */
-
- sp->master = spi_master_get(master);
-
- sp->bitbang.master = sp->master;
- sp->bitbang.chipselect = glamo_spigpio_chipsel;
- sp->bitbang.txrx_word[SPI_MODE_0] = glamo_spigpio_txrx_mode0;
- sp->bitbang.txrx_word[SPI_MODE_1] = glamo_spigpio_txrx_mode1;
- sp->bitbang.txrx_word[SPI_MODE_2] = glamo_spigpio_txrx_mode2;
- sp->bitbang.txrx_word[SPI_MODE_3] = glamo_spigpio_txrx_mode3;
-
- /* set state of spi pins */
- glamo_gpio_setpin(sp->info->core, sp->info->pin_clk, 0);
- glamo_gpio_setpin(sp->info->core, sp->info->pin_mosi, 0);
- glamo_gpio_setpin(sp->info->core, sp->info->pin_cs, 1);
-
- glamo_gpio_cfgpin(sp->info->core, sp->info->pin_clk);
- glamo_gpio_cfgpin(sp->info->core, sp->info->pin_mosi);
- glamo_gpio_cfgpin(sp->info->core, sp->info->pin_cs);
- if (sp->info->pin_miso)
- glamo_gpio_cfgpin(sp->info->core, sp->info->pin_miso);
-
- /* bring the LCM panel out of reset if it isn't already */
-
- glamo_gpio_setpin(sp->info->core, GLAMO_GPIO4, 1);
- glamo_gpio_cfgpin(sp->info->core, GLAMO_GPIO4_OUTPUT);
- msleep(90);
-
-#if 0
- sp->dev = &pdev->dev;
-
- sp->bitbang.setup_transfer = glamo_spi_setupxfer;
- sp->bitbang.txrx_bufs = glamo_spi_txrx;
- sp->bitbang.master->setup = glamo_spi_setup;
-#endif
-
- dev_set_drvdata(&sp->master->dev, sp);
-
- ret = spi_bitbang_start(&sp->bitbang);
- if (ret)
- goto err_no_bitbang;
-
- return 0;
-
-err_no_bitbang:
- platform_set_drvdata(pdev, NULL);
-err_no_pdev:
- spi_master_put(sp->bitbang.master);
-err:
- return ret;
-
-}
-
-static int glamo_spigpio_remove(struct platform_device *pdev)
-{
- struct glamo_spigpio *sp = platform_get_drvdata(pdev);
-
- spi_bitbang_stop(&sp->bitbang);
- spi_master_put(sp->bitbang.master);
-
- return 0;
-}
-
-
-#ifdef CONFIG_PM
-/*static int glamo_spigpio_suspend(struct device *dev)
-{
- return 0;
-}*/
-
-static int glamo_spigpio_resume(struct device *dev)
-{
- struct glamo_spigpio *sp = dev_get_drvdata(dev);
-
- if (!sp)
- return 0;
-
- /* set state of spi pins */
- glamo_gpio_setpin(sp->info->core, sp->info->pin_clk, 0);
- glamo_gpio_setpin(sp->info->core, sp->info->pin_mosi, 0);
- glamo_gpio_setpin(sp->info->core, sp->info->pin_cs, 1);
-
- glamo_gpio_cfgpin(sp->info->core, sp->info->pin_clk);
- glamo_gpio_cfgpin(sp->info->core, sp->info->pin_mosi);
- glamo_gpio_cfgpin(sp->info->core, sp->info->pin_cs);
- if (sp->info->pin_miso)
- glamo_gpio_cfgpin(sp->info->core, sp->info->pin_miso);
-
- return 0;
-}
-
-static struct dev_pm_ops glamo_spigpio_pm_ops = {
-/* .suspend = glamo_spiogpio_suspend,*/
- .resume_noirq = glamo_spigpio_resume,
-};
-
-#define GLAMO_SPIGPIO_PM_OPS (&glamo_spigpio_pm_ops)
-
-#else
-#define GLAMO_SPIGPIO_PM_OPS NULL
-#endif
-
-static struct platform_driver glamo_spi_drv = {
- .probe = glamo_spigpio_probe,
- .remove = glamo_spigpio_remove,
- .driver = {
- .name = "glamo-spi-gpio",
- .owner = THIS_MODULE,
- .pm = GLAMO_SPIGPIO_PM_OPS,
- },
-};
-
-static int __init glamo_spi_init(void)
-{
- return platform_driver_register(&glamo_spi_drv);
-}
-
-static void __exit glamo_spi_exit(void)
-{
- platform_driver_unregister(&glamo_spi_drv);
-}
-
-module_init(glamo_spi_init);
-module_exit(glamo_spi_exit);
-
-MODULE_DESCRIPTION("Smedia Glamo 336x/337x LCM serial command SPI Driver");
-MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>")
-MODULE_LICENSE("GPL");
projects / openwrt / svn-archive / archive.git / blobdiff