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path: root/drivers/usb/musb
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Diffstat (limited to 'drivers/usb/musb')
-rw-r--r--drivers/usb/musb/ux500.c61
-rw-r--r--drivers/usb/musb/ux500_dma.c59
2 files changed, 93 insertions, 27 deletions
diff --git a/drivers/usb/musb/ux500.c b/drivers/usb/musb/ux500.c
index 028ff4d07dc7..fce71b605936 100644
--- a/drivers/usb/musb/ux500.c
+++ b/drivers/usb/musb/ux500.c
@@ -25,11 +25,19 @@
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/io.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/usb/musb-ux500.h>
#include "musb_core.h"
+static struct musb_hdrc_config ux500_musb_hdrc_config = {
+ .multipoint = true,
+ .dyn_fifo = true,
+ .num_eps = 16,
+ .ram_bits = 16,
+};
+
struct ux500_glue {
struct device *dev;
struct platform_device *musb;
@@ -187,15 +195,58 @@ static const struct musb_platform_ops ux500_ops = {
.set_vbus = ux500_musb_set_vbus,
};
+static struct musb_hdrc_platform_data *
+ux500_of_probe(struct platform_device *pdev, struct device_node *np)
+{
+ struct musb_hdrc_platform_data *pdata;
+ const char *mode;
+ int strlen;
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return NULL;
+
+ mode = of_get_property(np, "dr_mode", &strlen);
+ if (!mode) {
+ dev_err(&pdev->dev, "No 'dr_mode' property found\n");
+ return NULL;
+ }
+
+ if (strlen > 0) {
+ if (!strcmp(mode, "host"))
+ pdata->mode = MUSB_HOST;
+ if (!strcmp(mode, "otg"))
+ pdata->mode = MUSB_OTG;
+ if (!strcmp(mode, "peripheral"))
+ pdata->mode = MUSB_PERIPHERAL;
+ }
+
+ return pdata;
+}
+
static int ux500_probe(struct platform_device *pdev)
{
struct resource musb_resources[2];
struct musb_hdrc_platform_data *pdata = pdev->dev.platform_data;
+ struct device_node *np = pdev->dev.of_node;
struct platform_device *musb;
struct ux500_glue *glue;
struct clk *clk;
int ret = -ENOMEM;
+ if (!pdata) {
+ if (np) {
+ pdata = ux500_of_probe(pdev, np);
+ if (!pdata)
+ goto err0;
+
+ pdev->dev.platform_data = pdata;
+ } else {
+ dev_err(&pdev->dev, "no pdata or device tree found\n");
+ goto err0;
+ }
+ }
+
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
if (!glue) {
dev_err(&pdev->dev, "failed to allocate glue context\n");
@@ -222,14 +273,16 @@ static int ux500_probe(struct platform_device *pdev)
}
musb->dev.parent = &pdev->dev;
- musb->dev.dma_mask = pdev->dev.dma_mask;
+ musb->dev.dma_mask = &pdev->dev.coherent_dma_mask;
musb->dev.coherent_dma_mask = pdev->dev.coherent_dma_mask;
+ musb->dev.of_node = pdev->dev.of_node;
glue->dev = &pdev->dev;
glue->musb = musb;
glue->clk = clk;
pdata->platform_ops = &ux500_ops;
+ pdata->config = &ux500_musb_hdrc_config;
platform_set_drvdata(pdev, glue);
@@ -334,12 +387,18 @@ static const struct dev_pm_ops ux500_pm_ops = {
#define DEV_PM_OPS NULL
#endif
+static const struct of_device_id ux500_match[] = {
+ { .compatible = "stericsson,db8500-musb", },
+ {}
+};
+
static struct platform_driver ux500_driver = {
.probe = ux500_probe,
.remove = ux500_remove,
.driver = {
.name = "musb-ux500",
.pm = DEV_PM_OPS,
+ .of_match_table = ux500_match,
},
};
diff --git a/drivers/usb/musb/ux500_dma.c b/drivers/usb/musb/ux500_dma.c
index 63e7c8a6b125..bfb7a65d83cc 100644
--- a/drivers/usb/musb/ux500_dma.c
+++ b/drivers/usb/musb/ux500_dma.c
@@ -34,6 +34,11 @@
#include <linux/platform_data/usb-musb-ux500.h>
#include "musb_core.h"
+static const char *iep_chan_names[] = { "iep_1_9", "iep_2_10", "iep_3_11", "iep_4_12",
+ "iep_5_13", "iep_6_14", "iep_7_15", "iep_8" };
+static const char *oep_chan_names[] = { "oep_1_9", "oep_2_10", "oep_3_11", "oep_4_12",
+ "oep_5_13", "oep_6_14", "oep_7_15", "oep_8" };
+
struct ux500_dma_channel {
struct dma_channel channel;
struct ux500_dma_controller *controller;
@@ -48,10 +53,8 @@ struct ux500_dma_channel {
struct ux500_dma_controller {
struct dma_controller controller;
- struct ux500_dma_channel rx_channel[UX500_MUSB_DMA_NUM_RX_CHANNELS];
- struct ux500_dma_channel tx_channel[UX500_MUSB_DMA_NUM_TX_CHANNELS];
- u32 num_rx_channels;
- u32 num_tx_channels;
+ struct ux500_dma_channel rx_channel[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS];
+ struct ux500_dma_channel tx_channel[UX500_MUSB_DMA_NUM_RX_TX_CHANNELS];
void *private_data;
dma_addr_t phy_base;
};
@@ -143,19 +146,15 @@ static struct dma_channel *ux500_dma_channel_allocate(struct dma_controller *c,
struct ux500_dma_channel *ux500_channel = NULL;
struct musb *musb = controller->private_data;
u8 ch_num = hw_ep->epnum - 1;
- u32 max_ch;
- /* Max 8 DMA channels (0 - 7). Each DMA channel can only be allocated
+ /* 8 DMA channels (0 - 7). Each DMA channel can only be allocated
* to specified hw_ep. For example DMA channel 0 can only be allocated
* to hw_ep 1 and 9.
*/
if (ch_num > 7)
ch_num -= 8;
- max_ch = is_tx ? controller->num_tx_channels :
- controller->num_rx_channels;
-
- if (ch_num >= max_ch)
+ if (ch_num >= UX500_MUSB_DMA_NUM_RX_TX_CHANNELS)
return NULL;
ux500_channel = is_tx ? &(controller->tx_channel[ch_num]) :
@@ -263,7 +262,7 @@ static int ux500_dma_controller_stop(struct dma_controller *c)
struct dma_channel *channel;
u8 ch_num;
- for (ch_num = 0; ch_num < controller->num_rx_channels; ch_num++) {
+ for (ch_num = 0; ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; ch_num++) {
channel = &controller->rx_channel[ch_num].channel;
ux500_channel = channel->private_data;
@@ -273,7 +272,7 @@ static int ux500_dma_controller_stop(struct dma_controller *c)
dma_release_channel(ux500_channel->dma_chan);
}
- for (ch_num = 0; ch_num < controller->num_tx_channels; ch_num++) {
+ for (ch_num = 0; ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS; ch_num++) {
channel = &controller->tx_channel[ch_num].channel;
ux500_channel = channel->private_data;
@@ -294,34 +293,36 @@ static int ux500_dma_controller_start(struct dma_controller *c)
struct musb *musb = controller->private_data;
struct device *dev = musb->controller;
struct musb_hdrc_platform_data *plat = dev->platform_data;
- struct ux500_musb_board_data *data = plat->board_data;
+ struct ux500_musb_board_data *data;
struct dma_channel *dma_channel = NULL;
+ char **chan_names;
u32 ch_num;
u8 dir;
u8 is_tx = 0;
void **param_array;
struct ux500_dma_channel *channel_array;
- u32 ch_count;
dma_cap_mask_t mask;
- if ((data->num_rx_channels > UX500_MUSB_DMA_NUM_RX_CHANNELS) ||
- (data->num_tx_channels > UX500_MUSB_DMA_NUM_TX_CHANNELS))
+ if (!plat) {
+ dev_err(musb->controller, "No platform data\n");
return -EINVAL;
+ }
- controller->num_rx_channels = data->num_rx_channels;
- controller->num_tx_channels = data->num_tx_channels;
+ data = plat->board_data;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
/* Prepare the loop for RX channels */
channel_array = controller->rx_channel;
- ch_count = data->num_rx_channels;
- param_array = data->dma_rx_param_array;
+ param_array = data ? data->dma_rx_param_array : NULL;
+ chan_names = (char **)iep_chan_names;
for (dir = 0; dir < 2; dir++) {
- for (ch_num = 0; ch_num < ch_count; ch_num++) {
+ for (ch_num = 0;
+ ch_num < UX500_MUSB_DMA_NUM_RX_TX_CHANNELS;
+ ch_num++) {
ux500_channel = &channel_array[ch_num];
ux500_channel->controller = controller;
ux500_channel->ch_num = ch_num;
@@ -332,9 +333,15 @@ static int ux500_dma_controller_start(struct dma_controller *c)
dma_channel->status = MUSB_DMA_STATUS_FREE;
dma_channel->max_len = SZ_16M;
- ux500_channel->dma_chan = dma_request_channel(mask,
- data->dma_filter,
- param_array[ch_num]);
+ ux500_channel->dma_chan =
+ dma_request_slave_channel(dev, chan_names[ch_num]);
+
+ if (!ux500_channel->dma_chan)
+ ux500_channel->dma_chan =
+ dma_request_channel(mask,
+ data->dma_filter,
+ param_array[ch_num]);
+
if (!ux500_channel->dma_chan) {
ERR("Dma pipe allocation error dir=%d ch=%d\n",
dir, ch_num);
@@ -349,8 +356,8 @@ static int ux500_dma_controller_start(struct dma_controller *c)
/* Prepare the loop for TX channels */
channel_array = controller->tx_channel;
- ch_count = data->num_tx_channels;
- param_array = data->dma_tx_param_array;
+ param_array = data ? data->dma_tx_param_array : NULL;
+ chan_names = (char **)oep_chan_names;
is_tx = 1;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 03:15:31 +0000