+++ /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
-#if 0
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/spinlock.h>
-#include <linux/workqueue.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_spi {
- struct spi_bitbang bitbang;
- struct spi_master *master;
- struct glamo_spi_info *info;
- struct device *dev;
-};
-
-static inline struct glamo_spi *to_gs(struct spi_device *spi)
-{
- return spi->controller_data;
-}
-
-static int glamo_spi_setupxfer(struct spi_device *spi, struct spi_transfer *t)
-{
- 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;
-}
-
-static void glamo_spi_chipsel(struct spi_device *spi, int value)
-{
-#if 0
- struct glamo_spi *gs = to_gs(spi);
-
- dev_dbg(&spi->dev, "chipsel %d: spi=%p, gs=%p, info=%p, handle=%p\n",
- value, spi, gs, gs->info, gs->info->glamofb_handle);
-
- glamofb_cmd_mode(gs->info->glamofb_handle, value);
-#endif
-}
-
-static int glamo_spi_txrx(struct spi_device *spi, struct spi_transfer *t)
-{
- struct glamo_spi *gs = to_gs(spi);
- const u_int16_t *ui16 = (const u_int16_t *) t->tx_buf;
- u_int16_t nine_bits;
- int i;
-
- dev_dbg(&spi->dev, "txrx: tx %p, rx %p, bpw %d, len %d\n",
- t->tx_buf, t->rx_buf, t->bits_per_word, t->len);
-
- if (spi->bits_per_word == 9)
- nine_bits = (1 << 9);
- else
- nine_bits = 0;
-
- if (t->len > 3 * sizeof(u_int16_t)) {
- dev_err(&spi->dev, "this driver doesn't support "
- "%u sized xfers\n", t->len);
- return -EINVAL;
- }
-
- for (i = 0; i < t->len/sizeof(u_int16_t); i++) {
- /* actually transfer the data */
-#if 1
- glamofb_cmd_write(gs->info->glamofb_handle,
- GLAMO_LCD_CMD_TYPE_SERIAL | nine_bits |
- (1 << 10) | (1 << 11) | (ui16[i] & 0x1ff));
-#endif
- /* FIXME: fire ?!? */
- if (i == 0 && (ui16[i] & 0x1ff) == 0x29) {
- dev_dbg(&spi->dev, "leaving command mode\n");
- glamofb_cmd_mode(gs->info->glamofb_handle, 0);
- }
- }
-
- return t->len;
-}
-
-static int glamo_spi_setup(struct spi_device *spi)
-{
- int ret;
-
- if (!spi->bits_per_word)
- spi->bits_per_word = 9;
-
- /* FIXME: hardware can do this */
- if (spi->mode & SPI_LSB_FIRST)
- return -EINVAL;
-
- ret = glamo_spi_setupxfer(spi, NULL);
- if (ret < 0) {
- dev_err(&spi->dev, "setupxfer returned %d\n", ret);
- return ret;
- }
-
- dev_dbg(&spi->dev, "%s: mode %d, %u bpw\n",
- __FUNCTION__, spi->mode, spi->bits_per_word);
-
- return 0;
-}
-
-static int glamo_spi_probe(struct platform_device *pdev)
-{
- struct spi_master *master;
- struct glamo_spi *sp;
- int ret;
- int i;
-
- master = spi_alloc_master(&pdev->dev, sizeof(struct glamo_spi));
- if (master == NULL) {
- dev_err(&pdev->dev, "failed to allocate spi master\n");
- ret = -ENOMEM;
- goto err;
- }
-
- sp = spi_master_get_devdata(master);
- memset(sp, 0, sizeof(struct glamo_spi));
-
- sp->master = spi_master_get(master);
- 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;
- }
- dev_dbg(&pdev->dev, "sp->info(pdata) = %p\n", sp->info);
-
- sp->dev = &pdev->dev;
-
- platform_set_drvdata(pdev, sp);
-
- sp->bitbang.master = sp->master;
- sp->bitbang.setup_transfer = glamo_spi_setupxfer;
- sp->bitbang.chipselect = glamo_spi_chipsel;
- sp->bitbang.txrx_bufs = glamo_spi_txrx;
- sp->bitbang.master->setup = glamo_spi_setup;
-
- ret = spi_bitbang_start(&sp->bitbang);
- if (ret)
- goto err_no_bitbang;
-
- /* register the chips to go with the board */
-
- glamofb_cmd_mode(sp->info->glamofb_handle, 1);
-
- for (i = 0; i < sp->info->board_size; i++) {
- dev_info(&pdev->dev, "registering %p: %s\n",
- &sp->info->board_info[i],
- sp->info->board_info[i].modalias);
-
- sp->info->board_info[i].controller_data = sp;
- spi_new_device(master, sp->info->board_info + i);
- }
-
- 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_spi_remove(struct platform_device *pdev)
-{
- struct glamo_spi *sp = platform_get_drvdata(pdev);
-
- spi_bitbang_stop(&sp->bitbang);
- spi_master_put(sp->bitbang.master);
-
- return 0;
-}
-
-#define glamo_spi_suspend NULL
-#define glamo_spi_resume NULL
-
-static struct platform_driver glamo_spi_drv = {
- .probe = glamo_spi_probe,
- .remove = glamo_spi_remove,
- .suspend = glamo_spi_suspend,
- .resume = glamo_spi_resume,
- .driver = {
- .name = "glamo-lcm-spi",
- .owner = THIS_MODULE,
- },
-};
-
-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");
-#endif
projects / openwrt.git / commitdiff