+++ /dev/null
-/*
- * linux/drivers/ssi/omap-tsc2101.c
- *
- * TSC2101 codec interface driver for the OMAP platform
- *
- * Copyright (C) 2004 Texas Instruments, Inc.
- *
- * This package 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 PACKAGE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * History:
- *
- * 2004/11/07 Nishanth Menon - Modified for common hooks for Audio and Touchscreen
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/sched.h>
-#include <linux/errno.h>
-#include <linux/delay.h>
-#include <linux/clk.h>
-
-#include <asm/system.h>
-#include <asm/irq.h>
-#include <asm/io.h>
-#include <asm/mach-types.h>
-#include <asm/hardware.h>
-
-#include <asm/arch/mux.h>
-#include <asm/arch/io.h>
-#include <asm/arch/hardware.h>
-#include <asm/hardware/tsc2101.h>
-#include <asm/arch/gpioexpander.h>
-
-#include "omap-tsc2101.h"
-
-#if CONFIG_ARCH_OMAP16XX
-#include <../drivers/ssi/omap-uwire.h>
-#else
-#error "Unsupported configuration"
-#endif
-
-#define SPIO 1
-
-static int count;
-static spinlock_t tsc2101_lock = SPIN_LOCK_UNLOCKED;
-static struct clk * tsc2101_mclk_ck;
-
-static int omap_tsc2101_configure(void);
-
-/* FIXME: add driver model usage to powerdown the tsc2101 on suspend */
-/* Clock -Hard coding for the time being */
-#define CLK_SOFT_REQ_REG_BASE (0xFFFE0800+0x34)
-#define SOFT_COM_MCK0_REQ_MASK (0x1<<6)
-
-int omap_tsc2101_enable(void)
-{
- int ret = 0;
-
- spin_lock(&tsc2101_lock);
- if (count++ == 0) {
- int ret = 0;
- /* set the Mux to provide MCLK to TSC2101 */
- if (machine_is_omap_h3()) {
- ret = omap_cfg_reg(V5_1710_MCLK_ON);
- } else {
- if (machine_is_omap_h2()) {
- ret = omap_cfg_reg(R10_1610_MCLK_ON);
- }
- }
-
- /* Get the MCLK */
- tsc2101_mclk_ck = clk_get(NULL, "mclk");
- if (NULL == tsc2101_mclk_ck) {
- printk(KERN_ERR "Unable to get the clock MCLK!!!\n");;
- ret = -EPERM;
- goto done;
- }
- if (clk_set_rate(tsc2101_mclk_ck, 12000000)) {
- printk(KERN_ERR "Unable to set rate to the MCLK!!!\n");;
- ret = -EPERM;
- goto done;
- }
- clk_enable(tsc2101_mclk_ck);
-
- ret = omap_tsc2101_configure();
-
- /* Lock the module */
- if (!ret && !try_module_get(THIS_MODULE)) {
- printk(KERN_CRIT "Failed to get TSC module\n");
- ret = -ESTALE;
- }
- }
-
-done:
- spin_unlock(&tsc2101_lock);
- return ret;
-}
-
-void omap_tsc2101_disable(void)
-{
- spin_lock(&tsc2101_lock);
- if (--count == 0) {
- int ret = 0;
- /* Remove the Mux to Stop MCLK to TSC2101 */
- if (machine_is_omap_h3()) {
- ret = omap_cfg_reg(V5_1710_MCLK_OFF);
- } else {
- if (machine_is_omap_h2()) {
- ret = omap_cfg_reg(R10_1610_MCLK_OFF);
- }
- }
-
- /* Release the MCLK */
- clk_disable(tsc2101_mclk_ck);
- clk_put(tsc2101_mclk_ck);
- tsc2101_mclk_ck = NULL;
-
- module_put(THIS_MODULE);
- }
- spin_unlock(&tsc2101_lock);
-}
-
-void omap_tsc2101_write(int page, u8 address, u16 data)
-{
-
- int ret = 0;
-
- if (machine_is_omap_h2()) {
- ret =
- omap_uwire_data_transfer(1,
- (((page) << 11) | (address << 5)),
- 16, 0, NULL, 1);
- if (ret) {
- printk(KERN_ERR
- "uwire-write returned error for address %x\n",
- address);
- return;
- }
- ret = omap_uwire_data_transfer(1, data, 16, 0, NULL, 0);
- if (ret) {
- printk(KERN_ERR
- "uwire-write returned error for address %x\n",
- address);
- return;
- }
- }
- if (machine_is_omap_h3()) {
-
- ret =
- omap_uwire_data_transfer(0, ((page << 11) | (address << 5)),
- 16, 0, NULL, 1);
- if (ret) {
- printk(KERN_ERR
- "uwire-write returned error for address %x\n",
- address);
- return;
- }
- ret = omap_uwire_data_transfer(0, data, 16, 0, NULL, 0);
- if (ret) {
- printk(KERN_ERR
- "uwire-write returned error for address %x\n",
- address);
- return;
- }
- }
-
-}
-
-void omap_tsc2101_reads(int page, u8 startaddress, u16 * data, int numregs)
-{
- int cs = 0, i;
- if (machine_is_omap_h2()) {
- cs = 1;
- }
- if (machine_is_omap_h3()) {
- cs = 0;
- }
- (void)omap_uwire_data_transfer(cs, (0x8000 | (page << 11)
- | (startaddress << 5)),
- 16, 0, NULL, 1);
- for (i = 0; i < (numregs - 1); i++, data++) {
- omap_uwire_data_transfer(cs, 0, 0, 16, data, 1);
- }
- omap_uwire_data_transfer(cs, 0, 0, 16, data, 0);
-}
-
-u16 omap_tsc2101_read(int page, u8 address)
-{
- u16 ret;
- omap_tsc2101_reads(page, address, &ret, 1);
- return ret;
-}
-
-/* FIXME: adapt clock divisors for uwire to current ARM xor clock rate */
-static int omap_tsc2101_configure(void)
-{
- unsigned long uwire_flags = 0;
-
-#ifdef CONFIG_MACH_OMAP_H3
- int err = 0;
- u8 ioExpanderVal = 0;
-
- if ((err = read_gpio_expa(&ioExpanderVal, 0x24))) {
- printk(" Error reading from I/O EXPANDER \n");
- return err;
- }
- ioExpanderVal |= 0x8;
-
- if ((err = write_gpio_expa(ioExpanderVal, 0x24))) {
- printk(KERN_ERR ": Error writing to I/O EXPANDER \n");
- return err;
- }
-#endif
-
- if (machine_is_omap_h2()) {
- uwire_flags = UWIRE_READ_RISING_EDGE | UWIRE_WRITE_RISING_EDGE;
- omap_cfg_reg(N15_1610_UWIRE_CS1);
- omap_uwire_configure_mode(1, uwire_flags);
- }
- if (machine_is_omap_h3()) {
- uwire_flags = UWIRE_READ_RISING_EDGE | UWIRE_WRITE_RISING_EDGE;
- omap_cfg_reg(N14_1610_UWIRE_CS0);
- omap_uwire_configure_mode(0, uwire_flags);
- }
-
- /* Configure MCLK enable */
- omap_writel(omap_readl(PU_PD_SEL_2) | (1 << 22), PU_PD_SEL_2);
-
- return 0;
-}
-
-EXPORT_SYMBOL(omap_tsc2101_enable);
-EXPORT_SYMBOL(omap_tsc2101_read);
-EXPORT_SYMBOL(omap_tsc2101_reads);
-EXPORT_SYMBOL(omap_tsc2101_write);
-EXPORT_SYMBOL(omap_tsc2101_disable);
-
-MODULE_AUTHOR("Texas Instruments");
-MODULE_DESCRIPTION
- ("Glue audio driver for the TI OMAP1610/OMAP1710 TSC2101 codec.");
-MODULE_LICENSE("GPL");
git.openpandora.org / pandora-kernel.git / commitdiff