summaryrefslogtreecommitdiffstats
path: root/arch/arm/plat-mxc/audmux-v2.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-mxc/audmux-v2.c')
-rw-r--r--arch/arm/plat-mxc/audmux-v2.c219
1 files changed, 0 insertions, 219 deletions
diff --git a/arch/arm/plat-mxc/audmux-v2.c b/arch/arm/plat-mxc/audmux-v2.c
deleted file mode 100644
index 8cced35..0000000
--- a/arch/arm/plat-mxc/audmux-v2.c
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
- * Copyright 2009 Pengutronix, Sascha Hauer <s.hauer@pengutronix.de>
- *
- * Initial development of this code was funded by
- * Phytec Messtechnik GmbH, http://www.phytec.de
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- */
-
-#include <linux/module.h>
-#include <linux/err.h>
-#include <linux/io.h>
-#include <linux/clk.h>
-#include <linux/debugfs.h>
-#include <linux/slab.h>
-#include <mach/audmux.h>
-#include <mach/hardware.h>
-
-static struct clk *audmux_clk;
-static void __iomem *audmux_base;
-
-#define MXC_AUDMUX_V2_PTCR(x) ((x) * 8)
-#define MXC_AUDMUX_V2_PDCR(x) ((x) * 8 + 4)
-
-#ifdef CONFIG_DEBUG_FS
-static struct dentry *audmux_debugfs_root;
-
-static int audmux_open_file(struct inode *inode, struct file *file)
-{
- file->private_data = inode->i_private;
- return 0;
-}
-
-/* There is an annoying discontinuity in the SSI numbering with regard
- * to the Linux number of the devices */
-static const char *audmux_port_string(int port)
-{
- switch (port) {
- case MX31_AUDMUX_PORT1_SSI0:
- return "imx-ssi.0";
- case MX31_AUDMUX_PORT2_SSI1:
- return "imx-ssi.1";
- case MX31_AUDMUX_PORT3_SSI_PINS_3:
- return "SSI3";
- case MX31_AUDMUX_PORT4_SSI_PINS_4:
- return "SSI4";
- case MX31_AUDMUX_PORT5_SSI_PINS_5:
- return "SSI5";
- case MX31_AUDMUX_PORT6_SSI_PINS_6:
- return "SSI6";
- default:
- return "UNKNOWN";
- }
-}
-
-static ssize_t audmux_read_file(struct file *file, char __user *user_buf,
- size_t count, loff_t *ppos)
-{
- ssize_t ret;
- char *buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
- int port = (int)file->private_data;
- u32 pdcr, ptcr;
-
- if (!buf)
- return -ENOMEM;
-
- if (audmux_clk)
- clk_enable(audmux_clk);
-
- ptcr = readl(audmux_base + MXC_AUDMUX_V2_PTCR(port));
- pdcr = readl(audmux_base + MXC_AUDMUX_V2_PDCR(port));
-
- if (audmux_clk)
- clk_disable(audmux_clk);
-
- ret = snprintf(buf, PAGE_SIZE, "PDCR: %08x\nPTCR: %08x\n",
- pdcr, ptcr);
-
- if (ptcr & MXC_AUDMUX_V2_PTCR_TFSDIR)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "TxFS output from %s, ",
- audmux_port_string((ptcr >> 27) & 0x7));
- else
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "TxFS input, ");
-
- if (ptcr & MXC_AUDMUX_V2_PTCR_TCLKDIR)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "TxClk output from %s",
- audmux_port_string((ptcr >> 22) & 0x7));
- else
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "TxClk input");
-
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
-
- if (ptcr & MXC_AUDMUX_V2_PTCR_SYN) {
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "Port is symmetric");
- } else {
- if (ptcr & MXC_AUDMUX_V2_PTCR_RFSDIR)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "RxFS output from %s, ",
- audmux_port_string((ptcr >> 17) & 0x7));
- else
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "RxFS input, ");
-
- if (ptcr & MXC_AUDMUX_V2_PTCR_RCLKDIR)
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "RxClk output from %s",
- audmux_port_string((ptcr >> 12) & 0x7));
- else
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "RxClk input");
- }
-
- ret += snprintf(buf + ret, PAGE_SIZE - ret,
- "\nData received from %s\n",
- audmux_port_string((pdcr >> 13) & 0x7));
-
- ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
-
- kfree(buf);
-
- return ret;
-}
-
-static const struct file_operations audmux_debugfs_fops = {
- .open = audmux_open_file,
- .read = audmux_read_file,
- .llseek = default_llseek,
-};
-
-static void audmux_debugfs_init(void)
-{
- int i;
- char buf[20];
-
- audmux_debugfs_root = debugfs_create_dir("audmux", NULL);
- if (!audmux_debugfs_root) {
- pr_warning("Failed to create AUDMUX debugfs root\n");
- return;
- }
-
- for (i = 1; i < 8; i++) {
- snprintf(buf, sizeof(buf), "ssi%d", i);
- if (!debugfs_create_file(buf, 0444, audmux_debugfs_root,
- (void *)i, &audmux_debugfs_fops))
- pr_warning("Failed to create AUDMUX port %d debugfs file\n",
- i);
- }
-}
-#else
-static inline void audmux_debugfs_init(void)
-{
-}
-#endif
-
-int mxc_audmux_v2_configure_port(unsigned int port, unsigned int ptcr,
- unsigned int pdcr)
-{
- if (!audmux_base)
- return -ENOSYS;
-
- if (audmux_clk)
- clk_enable(audmux_clk);
-
- writel(ptcr, audmux_base + MXC_AUDMUX_V2_PTCR(port));
- writel(pdcr, audmux_base + MXC_AUDMUX_V2_PDCR(port));
-
- if (audmux_clk)
- clk_disable(audmux_clk);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(mxc_audmux_v2_configure_port);
-
-static int mxc_audmux_v2_init(void)
-{
- int ret;
- if (cpu_is_mx51()) {
- audmux_base = MX51_IO_ADDRESS(MX51_AUDMUX_BASE_ADDR);
- } else if (cpu_is_mx31()) {
- audmux_base = MX31_IO_ADDRESS(MX31_AUDMUX_BASE_ADDR);
- } else if (cpu_is_mx35()) {
- audmux_clk = clk_get(NULL, "audmux");
- if (IS_ERR(audmux_clk)) {
- ret = PTR_ERR(audmux_clk);
- printk(KERN_ERR "%s: cannot get clock: %d\n", __func__,
- ret);
- return ret;
- }
- audmux_base = MX35_IO_ADDRESS(MX35_AUDMUX_BASE_ADDR);
- } else if (cpu_is_mx25()) {
- audmux_clk = clk_get(NULL, "audmux");
- if (IS_ERR(audmux_clk)) {
- ret = PTR_ERR(audmux_clk);
- printk(KERN_ERR "%s: cannot get clock: %d\n", __func__,
- ret);
- return ret;
- }
- audmux_base = MX25_IO_ADDRESS(MX25_AUDMUX_BASE_ADDR);
- }
-
- audmux_debugfs_init();
-
- return 0;
-}
-
-postcore_initcall(mxc_audmux_v2_init);