[PATCH] ARM: 2804/1: OMAP update 9/11: Update OMAP arch files
Patch from Tony Lindgren
This patch by various OMAP developers syncs the OMAP
specific arch files with the linux-omap tree.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index 10c3f22..43567d5 100644
--- a/arch/arm/plat-omap/mcbsp.c
+++ b/arch/arm/plat-omap/mcbsp.c
@@ -66,6 +66,7 @@
static struct omap_mcbsp mcbsp[OMAP_MAX_MCBSP_COUNT];
static struct clk *mcbsp_dsp_ck = 0;
static struct clk *mcbsp_api_ck = 0;
+static struct clk *mcbsp_dspxor_ck = 0;
static void omap_mcbsp_dump_reg(u8 id)
@@ -175,7 +176,7 @@
return 0;
}
- if (cpu_is_omap1510() || cpu_is_omap1610() || cpu_is_omap1710()) {
+ if (cpu_is_omap1510() || cpu_is_omap16xx()) {
if (id > OMAP_MAX_MCBSP_COUNT) {
printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
return -1;
@@ -191,15 +192,12 @@
static void omap_mcbsp_dsp_request(void)
{
- if (cpu_is_omap1510() || cpu_is_omap1610() || cpu_is_omap1710()) {
- omap_writew((omap_readw(ARM_RSTCT1) | (1 << 1) | (1 << 2)),
- ARM_RSTCT1);
- clk_enable(mcbsp_dsp_ck);
- clk_enable(mcbsp_api_ck);
+ if (cpu_is_omap1510() || cpu_is_omap16xx()) {
+ clk_use(mcbsp_dsp_ck);
+ clk_use(mcbsp_api_ck);
/* enable 12MHz clock to mcbsp 1 & 3 */
- __raw_writew(__raw_readw(DSP_IDLECT2) | (1 << EN_XORPCK),
- DSP_IDLECT2);
+ clk_use(mcbsp_dspxor_ck);
__raw_writew(__raw_readw(DSP_RSTCT2) | 1 | 1 << 1,
DSP_RSTCT2);
}
@@ -207,10 +205,13 @@
static void omap_mcbsp_dsp_free(void)
{
- /* Useless for now */
+ if (cpu_is_omap1510() || cpu_is_omap16xx()) {
+ clk_unuse(mcbsp_dspxor_ck);
+ clk_unuse(mcbsp_dsp_ck);
+ clk_unuse(mcbsp_api_ck);
+ }
}
-
int omap_mcbsp_request(unsigned int id)
{
int err;
@@ -350,6 +351,73 @@
}
+/* polled mcbsp i/o operations */
+int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
+{
+ u32 base = mcbsp[id].io_base;
+ writew(buf, base + OMAP_MCBSP_REG_DXR1);
+ /* if frame sync error - clear the error */
+ if (readw(base + OMAP_MCBSP_REG_SPCR2) & XSYNC_ERR) {
+ /* clear error */
+ writew(readw(base + OMAP_MCBSP_REG_SPCR2) & (~XSYNC_ERR),
+ base + OMAP_MCBSP_REG_SPCR2);
+ /* resend */
+ return -1;
+ } else {
+ /* wait for transmit confirmation */
+ int attemps = 0;
+ while (!(readw(base + OMAP_MCBSP_REG_SPCR2) & XRDY)) {
+ if (attemps++ > 1000) {
+ writew(readw(base + OMAP_MCBSP_REG_SPCR2) &
+ (~XRST),
+ base + OMAP_MCBSP_REG_SPCR2);
+ udelay(10);
+ writew(readw(base + OMAP_MCBSP_REG_SPCR2) |
+ (XRST),
+ base + OMAP_MCBSP_REG_SPCR2);
+ udelay(10);
+ printk(KERN_ERR
+ " Could not write to McBSP Register\n");
+ return -2;
+ }
+ }
+ }
+ return 0;
+}
+
+int omap_mcbsp_pollread(unsigned int id, u16 * buf)
+{
+ u32 base = mcbsp[id].io_base;
+ /* if frame sync error - clear the error */
+ if (readw(base + OMAP_MCBSP_REG_SPCR1) & RSYNC_ERR) {
+ /* clear error */
+ writew(readw(base + OMAP_MCBSP_REG_SPCR1) & (~RSYNC_ERR),
+ base + OMAP_MCBSP_REG_SPCR1);
+ /* resend */
+ return -1;
+ } else {
+ /* wait for recieve confirmation */
+ int attemps = 0;
+ while (!(readw(base + OMAP_MCBSP_REG_SPCR1) & RRDY)) {
+ if (attemps++ > 1000) {
+ writew(readw(base + OMAP_MCBSP_REG_SPCR1) &
+ (~RRST),
+ base + OMAP_MCBSP_REG_SPCR1);
+ udelay(10);
+ writew(readw(base + OMAP_MCBSP_REG_SPCR1) |
+ (RRST),
+ base + OMAP_MCBSP_REG_SPCR1);
+ udelay(10);
+ printk(KERN_ERR
+ " Could not read from McBSP Register\n");
+ return -2;
+ }
+ }
+ }
+ *buf = readw(base + OMAP_MCBSP_REG_DRR1);
+ return 0;
+}
+
/*
* IRQ based word transmission.
*/
@@ -625,10 +693,15 @@
return PTR_ERR(mcbsp_dsp_ck);
}
mcbsp_api_ck = clk_get(0, "api_ck");
- if (IS_ERR(mcbsp_dsp_ck)) {
+ if (IS_ERR(mcbsp_api_ck)) {
printk(KERN_ERR "mcbsp: could not acquire api_ck handle.\n");
return PTR_ERR(mcbsp_api_ck);
}
+ mcbsp_dspxor_ck = clk_get(0, "dspxor_ck");
+ if (IS_ERR(mcbsp_dspxor_ck)) {
+ printk(KERN_ERR "mcbsp: could not acquire dspxor_ck handle.\n");
+ return PTR_ERR(mcbsp_dspxor_ck);
+ }
#ifdef CONFIG_ARCH_OMAP730
if (cpu_is_omap730()) {
@@ -643,7 +716,7 @@
}
#endif
#if defined(CONFIG_ARCH_OMAP16XX)
- if (cpu_is_omap1610() || cpu_is_omap1710()) {
+ if (cpu_is_omap16xx()) {
mcbsp_info = mcbsp_1610;
mcbsp_count = ARRAY_SIZE(mcbsp_1610);
}
