diff options
Diffstat (limited to 'packages/linux/linux-2.6.18/at32-dac-oss-driver-clk-fix.patch')
| -rw-r--r-- | packages/linux/linux-2.6.18/at32-dac-oss-driver-clk-fix.patch | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/packages/linux/linux-2.6.18/at32-dac-oss-driver-clk-fix.patch b/packages/linux/linux-2.6.18/at32-dac-oss-driver-clk-fix.patch new file mode 100644 index 0000000000..927cdc5ece --- /dev/null +++ b/packages/linux/linux-2.6.18/at32-dac-oss-driver-clk-fix.patch @@ -0,0 +1,175 @@ +--- + sound/oss/at32dac.c | 72 +++++++++++++++++++++++++++++++--------------------- + 1 file changed, 43 insertions(+), 29 deletions(-) + +Index: linux-2.6.18-avr32/sound/oss/at32dac.c +=================================================================== +--- linux-2.6.18-avr32.orig/sound/oss/at32dac.c 2006-11-01 14:30:47.000000000 +0100 ++++ linux-2.6.18-avr32/sound/oss/at32dac.c 2006-11-01 14:32:05.000000000 +0100 +@@ -71,6 +71,7 @@ struct at32_dac { + struct dma_request_cyclic req; + + struct clk *mck; ++ struct clk *sample_clk; + struct platform_device *pdev; + int busy; + int playing; +@@ -116,24 +117,6 @@ static void at32dac_update_dma_tail(stru + } + } + +-static int at32dac_start_genclock(struct at32_dac *dac) +-{ +- unsigned int div; +- +- div = ((clk_get_rate(boot_cpu_data.clk) + 256 * dac->dsp_settings.sample_rate) +- / (512 * dac->dsp_settings.sample_rate) - 1); +- pr_debug("Real sample rate: %llu (div=%u)\n", +- boot_cpu_data.cpu_hz / (512 * (div + 1)), div); +- writel((div << 8) | 0x16, (void __iomem *)(0xfff00060 + 4 * 6)); +- +- return 0; +-} +- +-static void at32dac_stop_genclock(struct at32_dac *dac) +-{ +- writel(0, (void __iomem *)(0xfff00060 + 4 * 6)); +-} +- + static int at32dac_start(struct at32_dac *dac) + { + int ret; +@@ -143,13 +126,11 @@ static int at32dac_start(struct at32_dac + + memset(dac->dma.buf, 0, DMA_BUFFER_SIZE); + +- ret = at32dac_start_genclock(dac); +- if (ret) +- return ret; ++ clk_enable(dac->sample_clk); + + ret = dma_prepare_request_cyclic(dac->req.req.dmac, &dac->req); + if (ret) +- goto out_stop_genclock; ++ goto out_stop_clock; + + pr_debug("Starting DMA...\n"); + ret = dma_start_request(dac->req.req.dmac, dac->req.req.channel); +@@ -164,8 +145,8 @@ static int at32dac_start(struct at32_dac + out_stop_request: + dma_stop_request(dac->req.req.dmac, + dac->req.req.channel); +-out_stop_genclock: +- at32dac_stop_genclock(dac); ++out_stop_clock: ++ clk_disable(dac->sample_clk); + return ret; + } + +@@ -176,7 +157,7 @@ static int at32dac_stop(struct at32_dac + dac_writel(dac, DATA, 0); + dac_writel(dac, CTRL, 0); + dac->playing = 0; +- at32dac_stop_genclock(dac); ++ clk_disable(dac->sample_clk); + } + + return 0; +@@ -360,6 +341,26 @@ static int at32dac_set_format(struct at3 + return 0; + } + ++static int at32dac_set_sample_rate(struct at32_dac *dac, unsigned long rate) ++{ ++ unsigned long new_rate; ++ int ret; ++ ++ ret = clk_set_rate(dac->sample_clk, 256 * rate); ++ if (ret < 0) ++ return ret; ++ ++ /* TODO: mplayer seems to have a problem with this */ ++#if 0 ++ new_rate = clk_get_rate(dac->sample_clk); ++ dac->dsp_settings.sample_rate = new_rate / 256; ++#else ++ dac->dsp_settings.sample_rate = rate; ++#endif ++ ++ return 0; ++} ++ + static ssize_t at32dac_dsp_write(struct file *file, + const char __user *buffer, + size_t count, loff_t *ppos) +@@ -449,7 +450,9 @@ static int at32dac_dsp_ioctl(struct inod + return -EFAULT; + if (val >= 0) { + at32dac_stop(dac); +- dac->dsp_settings.sample_rate = val; ++ ret = at32dac_set_sample_rate(dac, val); ++ if (ret) ++ return ret; + } + return put_user(dac->dsp_settings.sample_rate, up); + +@@ -534,10 +537,11 @@ static int at32dac_dsp_open(struct inode + dac->dma.head = dac->dma.tail = 0; + + /* FIXME: What are the correct defaults? */ +- dac->dsp_settings.format = AFMT_S16_BE; + dac->dsp_settings.channels = 2; +- dac->dsp_settings.sample_rate = 8000; +- dac->dsp_settings.input_order = 2; ++ at32dac_set_format(dac, AFMT_S16_BE); ++ ret = at32dac_set_sample_rate(dac, 8000); ++ if (ret) ++ goto out; + + file->private_data = dac; + dac->busy = 1; +@@ -578,6 +582,7 @@ static int __devinit at32dac_probe(struc + struct at32_dac *dac; + struct resource *regs; + struct clk *mck; ++ struct clk *sample_clk; + int irq; + int ret; + +@@ -594,6 +599,11 @@ static int __devinit at32dac_probe(struc + mck = clk_get(&pdev->dev, "mck"); + if (IS_ERR(mck)) + return PTR_ERR(mck); ++ sample_clk = clk_get(&pdev->dev, "sample_clk"); ++ if (IS_ERR(sample_clk)) { ++ ret = PTR_ERR(sample_clk); ++ goto out_put_mck; ++ } + clk_enable(mck); + + ret = -ENOMEM; +@@ -606,6 +616,7 @@ static int __devinit at32dac_probe(struc + init_waitqueue_head(&dac->write_wait); + dac->pdev = pdev; + dac->mck = mck; ++ dac->sample_clk = sample_clk; + + dac->regs = ioremap(regs->start, regs->end - regs->start + 1); + if (!dac->regs) +@@ -658,6 +669,8 @@ out_free_dac: + kfree(dac); + out_disable_clk: + clk_disable(mck); ++ clk_put(sample_clk); ++out_put_mck: + clk_put(mck); + return ret; + } +@@ -673,6 +686,7 @@ static int __devexit at32dac_remove(stru + free_irq(platform_get_irq(pdev, 0), dac); + iounmap(dac->regs); + clk_disable(dac->mck); ++ clk_put(dac->sample_clk); + clk_put(dac->mck); + kfree(dac); + platform_set_drvdata(pdev, NULL); |