#include <linux/err.h>
#include <linux/clk.h>
#include <linux/delay.h>
-
-#include <asm/io.h>
-#include <asm/irq.h>
+#include <linux/io.h>
#include <asm/arch/dma.h>
#include <asm/arch/mux.h>
struct completion tx_dma_completion;
struct completion rx_dma_completion;
+ /* Protect the field .free, while checking if the mcbsp is in use */
spinlock_t lock;
};
static struct omap_mcbsp mcbsp[OMAP_MAX_MCBSP_COUNT];
#ifdef CONFIG_ARCH_OMAP1
-static struct clk *mcbsp_dsp_ck = 0;
-static struct clk *mcbsp_api_ck = 0;
-static struct clk *mcbsp_dspxor_ck = 0;
+static struct clk *mcbsp_dsp_ck;
+static struct clk *mcbsp_api_ck;
+static struct clk *mcbsp_dspxor_ck;
#endif
#ifdef CONFIG_ARCH_OMAP2
-static struct clk *mcbsp1_ick = 0;
-static struct clk *mcbsp1_fck = 0;
-static struct clk *mcbsp2_ick = 0;
-static struct clk *mcbsp2_fck = 0;
+static struct clk *mcbsp1_ick;
+static struct clk *mcbsp1_fck;
+static struct clk *mcbsp2_ick;
+static struct clk *mcbsp2_fck;
#endif
static void omap_mcbsp_dump_reg(u8 id)
OMAP_MCBSP_READ(mcbsp_tx->io_base, SPCR2));
complete(&mcbsp_tx->tx_irq_completion);
+
return IRQ_HANDLED;
}
OMAP_MCBSP_READ(mcbsp_rx->io_base, SPCR2));
complete(&mcbsp_rx->rx_irq_completion);
+
return IRQ_HANDLED;
}
complete(&mcbsp_dma_rx->rx_dma_completion);
}
-
/*
* omap_mcbsp_config simply write a config to the
* appropriate McBSP.
* You either call this function or set the McBSP registers
* by yourself before calling omap_mcbsp_start().
*/
-
-void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg * config)
+void omap_mcbsp_config(unsigned int id, const struct omap_mcbsp_reg_cfg *config)
{
u32 io_base = mcbsp[id].io_base;
- DBG("OMAP-McBSP: McBSP%d io_base: 0x%8x\n", id+1, io_base);
+ DBG("OMAP-McBSP: McBSP%d io_base: 0x%8x\n", id + 1, io_base);
/* We write the given config */
OMAP_MCBSP_WRITE(io_base, SPCR2, config->spcr2);
OMAP_MCBSP_WRITE(io_base, MCR1, config->mcr1);
OMAP_MCBSP_WRITE(io_base, PCR0, config->pcr0);
}
-
-
+EXPORT_SYMBOL(omap_mcbsp_config);
static int omap_mcbsp_check(unsigned int id)
{
if (cpu_is_omap730()) {
if (id > OMAP_MAX_MCBSP_COUNT - 1) {
- printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
+ printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n",
+ id + 1);
return -1;
}
return 0;
if (cpu_is_omap15xx() || cpu_is_omap16xx() || cpu_is_omap24xx()) {
if (id > OMAP_MAX_MCBSP_COUNT) {
- printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n", id + 1);
+ printk(KERN_ERR "OMAP-McBSP: McBSP%d doesn't exist\n",
+ id + 1);
return -1;
}
return 0;
spin_lock(&mcbsp[id].lock);
if (!mcbsp[id].free) {
- printk (KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n", id + 1);
+ printk(KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n",
+ id + 1);
spin_unlock(&mcbsp[id].lock);
return -EINVAL;
}
return 0;
}
+EXPORT_SYMBOL(omap_mcbsp_set_io_type);
int omap_mcbsp_request(unsigned int id)
{
spin_lock(&mcbsp[id].lock);
if (!mcbsp[id].free) {
- printk (KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n", id + 1);
+ printk(KERN_ERR "OMAP-McBSP: McBSP%d is currently in use\n",
+ id + 1);
spin_unlock(&mcbsp[id].lock);
return -1;
}
if (mcbsp[id].io_type == OMAP_MCBSP_IRQ_IO) {
/* We need to get IRQs here */
- err = request_irq(mcbsp[id].tx_irq, omap_mcbsp_tx_irq_handler, 0,
- "McBSP",
- (void *) (&mcbsp[id]));
+ err = request_irq(mcbsp[id].tx_irq, omap_mcbsp_tx_irq_handler,
+ 0, "McBSP", (void *) (&mcbsp[id]));
if (err != 0) {
- printk(KERN_ERR "OMAP-McBSP: Unable to request TX IRQ %d for McBSP%d\n",
- mcbsp[id].tx_irq, mcbsp[id].id);
+ printk(KERN_ERR "OMAP-McBSP: Unable to "
+ "request TX IRQ %d for McBSP%d\n",
+ mcbsp[id].tx_irq, mcbsp[id].id);
return err;
}
init_completion(&(mcbsp[id].tx_irq_completion));
-
- err = request_irq(mcbsp[id].rx_irq, omap_mcbsp_rx_irq_handler, 0,
- "McBSP",
- (void *) (&mcbsp[id]));
+ err = request_irq(mcbsp[id].rx_irq, omap_mcbsp_rx_irq_handler,
+ 0, "McBSP", (void *) (&mcbsp[id]));
if (err != 0) {
- printk(KERN_ERR "OMAP-McBSP: Unable to request RX IRQ %d for McBSP%d\n",
- mcbsp[id].rx_irq, mcbsp[id].id);
+ printk(KERN_ERR "OMAP-McBSP: Unable to "
+ "request RX IRQ %d for McBSP%d\n",
+ mcbsp[id].rx_irq, mcbsp[id].id);
free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
return err;
}
}
return 0;
-
}
+EXPORT_SYMBOL(omap_mcbsp_request);
void omap_mcbsp_free(unsigned int id)
{
spin_lock(&mcbsp[id].lock);
if (mcbsp[id].free) {
- printk (KERN_ERR "OMAP-McBSP: McBSP%d was not reserved\n", id + 1);
+ printk(KERN_ERR "OMAP-McBSP: McBSP%d was not reserved\n",
+ id + 1);
spin_unlock(&mcbsp[id].lock);
return;
}
free_irq(mcbsp[id].tx_irq, (void *) (&mcbsp[id]));
}
}
+EXPORT_SYMBOL(omap_mcbsp_free);
/*
* Here we start the McBSP, by enabling the sample
io_base = mcbsp[id].io_base;
- mcbsp[id].rx_word_length = ((OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7);
- mcbsp[id].tx_word_length = ((OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7);
+ mcbsp[id].rx_word_length = (OMAP_MCBSP_READ(io_base, RCR1) >> 5) & 0x7;
+ mcbsp[id].tx_word_length = (OMAP_MCBSP_READ(io_base, XCR1) >> 5) & 0x7;
/* Start the sample generator */
w = OMAP_MCBSP_READ(io_base, SPCR2);
/* Dump McBSP Regs */
omap_mcbsp_dump_reg(id);
-
}
+EXPORT_SYMBOL(omap_mcbsp_start);
void omap_mcbsp_stop(unsigned int id)
{
io_base = mcbsp[id].io_base;
- /* Reset transmitter */
+ /* Reset transmitter */
w = OMAP_MCBSP_READ(io_base, SPCR2);
OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1));
w = OMAP_MCBSP_READ(io_base, SPCR2);
OMAP_MCBSP_WRITE(io_base, SPCR2, w & ~(1 << 6));
}
-
+EXPORT_SYMBOL(omap_mcbsp_stop);
/* polled mcbsp i/o operations */
int omap_mcbsp_pollwrite(unsigned int id, u16 buf)
}
}
}
+
return 0;
}
+EXPORT_SYMBOL(omap_mcbsp_pollwrite);
-int omap_mcbsp_pollread(unsigned int id, u16 * buf)
+int omap_mcbsp_pollread(unsigned int id, u16 *buf)
{
u32 base = mcbsp[id].io_base;
/* if frame sync error - clear the error */
}
}
*buf = readw(base + OMAP_MCBSP_REG_DRR1);
+
return 0;
}
+EXPORT_SYMBOL(omap_mcbsp_pollread);
/*
* IRQ based word transmission.
OMAP_MCBSP_WRITE(io_base, DXR2, word >> 16);
OMAP_MCBSP_WRITE(io_base, DXR1, word & 0xffff);
}
+EXPORT_SYMBOL(omap_mcbsp_xmit_word);
u32 omap_mcbsp_recv_word(unsigned int id)
{
return (word_lsb | (word_msb << 16));
}
-
+EXPORT_SYMBOL(omap_mcbsp_recv_word);
int omap_mcbsp_spi_master_xmit_word_poll(unsigned int id, u32 word)
{
udelay(10);
OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST);
udelay(10);
- printk("McBSP transmitter not ready\n");
+ printk(KERN_ERR "McBSP transmitter not ready\n");
return -EAGAIN;
}
}
udelay(10);
OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST);
udelay(10);
- printk("McBSP receiver not ready\n");
+ printk(KERN_ERR "McBSP receiver not ready\n");
return -EAGAIN;
}
}
return 0;
}
+EXPORT_SYMBOL(omap_mcbsp_spi_master_xmit_word_poll);
-int omap_mcbsp_spi_master_recv_word_poll(unsigned int id, u32 * word)
+int omap_mcbsp_spi_master_recv_word_poll(unsigned int id, u32 *word)
{
u32 io_base = mcbsp[id].io_base, clock_word = 0;
omap_mcbsp_word_length tx_word_length = mcbsp[id].tx_word_length;
udelay(10);
OMAP_MCBSP_WRITE(io_base, SPCR2, spcr2 | XRST);
udelay(10);
- printk("McBSP transmitter not ready\n");
+ printk(KERN_ERR "McBSP transmitter not ready\n");
return -EAGAIN;
}
}
udelay(10);
OMAP_MCBSP_WRITE(io_base, SPCR1, spcr1 | RRST);
udelay(10);
- printk("McBSP receiver not ready\n");
+ printk(KERN_ERR "McBSP receiver not ready\n");
return -EAGAIN;
}
}
return 0;
}
-
+EXPORT_SYMBOL(omap_mcbsp_spi_master_recv_word_poll);
/*
* Simple DMA based buffer rx/tx routines.
* For anything fancier, you should use your own customized DMA
* routines and callbacks.
*/
-int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer, unsigned int length)
+int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer,
+ unsigned int length)
{
int dma_tx_ch;
int src_port = 0;
if (omap_mcbsp_check(id) < 0)
return -EINVAL;
- if (omap_request_dma(mcbsp[id].dma_tx_sync, "McBSP TX", omap_mcbsp_tx_dma_callback,
- &mcbsp[id],
- &dma_tx_ch)) {
- printk("OMAP-McBSP: Unable to request DMA channel for McBSP%d TX. Trying IRQ based TX\n", id+1);
+ if (omap_request_dma(mcbsp[id].dma_tx_sync, "McBSP TX",
+ omap_mcbsp_tx_dma_callback,
+ &mcbsp[id],
+ &dma_tx_ch)) {
+ printk(KERN_ERR "OMAP-McBSP: Unable to request DMA channel for"
+ " McBSP%d TX. Trying IRQ based TX\n", id + 1);
return -EAGAIN;
}
mcbsp[id].dma_tx_lch = dma_tx_ch;
omap_start_dma(mcbsp[id].dma_tx_lch);
wait_for_completion(&(mcbsp[id].tx_dma_completion));
+
return 0;
}
+EXPORT_SYMBOL(omap_mcbsp_xmit_buffer);
-
-int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer, unsigned int length)
+int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer,
+ unsigned int length)
{
int dma_rx_ch;
int src_port = 0;
if (omap_mcbsp_check(id) < 0)
return -EINVAL;
- if (omap_request_dma(mcbsp[id].dma_rx_sync, "McBSP RX", omap_mcbsp_rx_dma_callback,
- &mcbsp[id],
- &dma_rx_ch)) {
- printk("Unable to request DMA channel for McBSP%d RX. Trying IRQ based RX\n", id+1);
+ if (omap_request_dma(mcbsp[id].dma_rx_sync, "McBSP RX",
+ omap_mcbsp_rx_dma_callback,
+ &mcbsp[id],
+ &dma_rx_ch)) {
+ printk(KERN_ERR "Unable to request DMA channel for McBSP%d RX."
+ " Trying IRQ based RX\n", id + 1);
return -EAGAIN;
}
mcbsp[id].dma_rx_lch = dma_rx_ch;
sync_dev = mcbsp[id].dma_rx_sync;
omap_set_dma_transfer_params(mcbsp[id].dma_rx_lch,
- OMAP_DMA_DATA_TYPE_S16,
- length >> 1, 1,
- OMAP_DMA_SYNC_ELEMENT,
- sync_dev, 0);
+ OMAP_DMA_DATA_TYPE_S16,
+ length >> 1, 1,
+ OMAP_DMA_SYNC_ELEMENT,
+ sync_dev, 0);
omap_set_dma_src_params(mcbsp[id].dma_rx_lch,
src_port,
0, 0);
omap_set_dma_dest_params(mcbsp[id].dma_rx_lch,
- dest_port,
- OMAP_DMA_AMODE_POST_INC,
- buffer,
- 0, 0);
+ dest_port,
+ OMAP_DMA_AMODE_POST_INC,
+ buffer,
+ 0, 0);
omap_start_dma(mcbsp[id].dma_rx_lch);
wait_for_completion(&(mcbsp[id].rx_dma_completion));
+
return 0;
}
-
+EXPORT_SYMBOL(omap_mcbsp_recv_buffer);
/*
* SPI wrapper.
* this wrapper just need an omap_mcbsp_spi_cfg structure as an input.
* Once this is done, you can call omap_mcbsp_start().
*/
-void omap_mcbsp_set_spi_mode(unsigned int id, const struct omap_mcbsp_spi_cfg * spi_cfg)
+void omap_mcbsp_set_spi_mode(unsigned int id,
+ const struct omap_mcbsp_spi_cfg *spi_cfg)
{
struct omap_mcbsp_reg_cfg mcbsp_cfg;
mcbsp_cfg.rcr1 |= (RWDLEN1(spi_cfg->word_length) | RFRLEN1(0));
mcbsp_cfg.xcr1 |= (XWDLEN1(spi_cfg->word_length) | XFRLEN1(0));
- /* Clock stop mode */
+ /* Clock stop mode */
if (spi_cfg->clk_stp_mode == OMAP_MCBSP_CLK_STP_MODE_NO_DELAY)
mcbsp_cfg.spcr1 |= (1 << 12);
else
if (spi_cfg->spi_mode == OMAP_MCBSP_SPI_MASTER) {
mcbsp_cfg.pcr0 |= CLKXM;
- mcbsp_cfg.srgr1 |= CLKGDV(spi_cfg->clk_div -1);
+ mcbsp_cfg.srgr1 |= CLKGDV(spi_cfg->clk_div - 1);
mcbsp_cfg.pcr0 |= FSXM;
mcbsp_cfg.srgr2 &= ~FSGM;
mcbsp_cfg.xcr2 |= XDATDLY(1);
mcbsp_cfg.rcr2 |= RDATDLY(1);
- }
- else {
+ } else {
mcbsp_cfg.pcr0 &= ~CLKXM;
mcbsp_cfg.srgr1 |= CLKGDV(1);
mcbsp_cfg.pcr0 &= ~FSXM;
omap_mcbsp_config(id, &mcbsp_cfg);
}
-
+EXPORT_SYMBOL(omap_mcbsp_set_spi_mode);
/*
* McBSP1 and McBSP3 are directly mapped on 1610 and 1510.
int mcbsp_count = 0, i;
static const struct omap_mcbsp_info *mcbsp_info;
- printk("Initializing OMAP McBSP system\n");
+ printk(KERN_INFO "Initializing OMAP McBSP system\n");
#ifdef CONFIG_ARCH_OMAP1
mcbsp_dsp_ck = clk_get(0, "dsp_ck");
#ifdef CONFIG_ARCH_OMAP2
mcbsp1_ick = clk_get(0, "mcbsp1_ick");
if (IS_ERR(mcbsp1_ick)) {
- printk(KERN_ERR "mcbsp: could not acquire mcbsp1_ick handle.\n");
+ printk(KERN_ERR "mcbsp: could not acquire "
+ "mcbsp1_ick handle.\n");
return PTR_ERR(mcbsp1_ick);
}
mcbsp1_fck = clk_get(0, "mcbsp1_fck");
if (IS_ERR(mcbsp1_fck)) {
- printk(KERN_ERR "mcbsp: could not acquire mcbsp1_fck handle.\n");
+ printk(KERN_ERR "mcbsp: could not acquire "
+ "mcbsp1_fck handle.\n");
return PTR_ERR(mcbsp1_fck);
}
mcbsp2_ick = clk_get(0, "mcbsp2_ick");
if (IS_ERR(mcbsp2_ick)) {
- printk(KERN_ERR "mcbsp: could not acquire mcbsp2_ick handle.\n");
+ printk(KERN_ERR "mcbsp: could not acquire "
+ "mcbsp2_ick handle.\n");
return PTR_ERR(mcbsp2_ick);
}
mcbsp2_fck = clk_get(0, "mcbsp2_fck");
if (IS_ERR(mcbsp2_fck)) {
- printk(KERN_ERR "mcbsp: could not acquire mcbsp2_fck handle.\n");
+ printk(KERN_ERR "mcbsp: could not acquire "
+ "mcbsp2_fck handle.\n");
return PTR_ERR(mcbsp2_fck);
}
#endif
if (i >= mcbsp_count) {
mcbsp[i].io_base = 0;
mcbsp[i].free = 0;
- continue;
+ continue;
}
mcbsp[i].id = i + 1;
mcbsp[i].free = 1;
mcbsp[i].dma_rx_lch = -1;
mcbsp[i].io_base = mcbsp_info[i].virt_base;
- mcbsp[i].io_type = OMAP_MCBSP_IRQ_IO; /* Default I/O is IRQ based */
+ /* Default I/O is IRQ based */
+ mcbsp[i].io_type = OMAP_MCBSP_IRQ_IO;
mcbsp[i].tx_irq = mcbsp_info[i].tx_irq;
mcbsp[i].rx_irq = mcbsp_info[i].rx_irq;
mcbsp[i].dma_rx_sync = mcbsp_info[i].dma_rx_sync;
}
arch_initcall(omap_mcbsp_init);
-
-EXPORT_SYMBOL(omap_mcbsp_config);
-EXPORT_SYMBOL(omap_mcbsp_request);
-EXPORT_SYMBOL(omap_mcbsp_set_io_type);
-EXPORT_SYMBOL(omap_mcbsp_free);
-EXPORT_SYMBOL(omap_mcbsp_start);
-EXPORT_SYMBOL(omap_mcbsp_stop);
-EXPORT_SYMBOL(omap_mcbsp_pollread);
-EXPORT_SYMBOL(omap_mcbsp_pollwrite);
-EXPORT_SYMBOL(omap_mcbsp_xmit_word);
-EXPORT_SYMBOL(omap_mcbsp_recv_word);
-EXPORT_SYMBOL(omap_mcbsp_xmit_buffer);
-EXPORT_SYMBOL(omap_mcbsp_recv_buffer);
-EXPORT_SYMBOL(omap_mcbsp_spi_master_xmit_word_poll);
-EXPORT_SYMBOL(omap_mcbsp_spi_master_recv_word_poll);
-EXPORT_SYMBOL(omap_mcbsp_set_spi_mode);
projects / linux-2.6 / commitdiff