diff options
| author | Peter Chen <peter.chen@freescale.com> | 2015-03-17 12:32:45 +0300 |
|---|---|---|
| committer | Peter Chen <peter.chen@freescale.com> | 2015-08-14 05:03:58 +0300 |
| commit | 96625eadca1bb8832fb502f0899a543695f1ba35 (patch) | |
| tree | f9f14300d30bcf9bf0b3b830838bb66e26566741 /drivers | |
| parent | bd6e9d115df7fc6f11f3021c6fc05e3eaeb04a32 (diff) | |
| download | linux-96625eadca1bb8832fb502f0899a543695f1ba35.tar.xz | |
usb: chipidea: add tx/rx burst size configuration interface
The user can adjust it through dts or platform data
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/chipidea/bits.h | 4 | ||||
| -rw-r--r-- | drivers/usb/chipidea/ci.h | 1 | ||||
| -rw-r--r-- | drivers/usb/chipidea/core.c | 35 |
3 files changed, 40 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/bits.h b/drivers/usb/chipidea/bits.h index 462ad02167b8..e462f55c8b99 100644 --- a/drivers/usb/chipidea/bits.h +++ b/drivers/usb/chipidea/bits.h @@ -61,6 +61,10 @@ /* Set non-zero value for internal TT Hub address representation */ #define TTCTRL_TTHA (0x7fUL << 24) +/* BURSTSIZE */ +#define RX_BURST_MASK 0xff +#define TX_BURST_MASK 0xff00 + /* PORTSC */ #define PORTSC_CCS BIT(0) #define PORTSC_CSC BIT(1) diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index 1320a4dbbcd5..62f2a7be0697 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -51,6 +51,7 @@ enum ci_hw_regs { OP_DEVICEADDR, OP_ENDPTLISTADDR, OP_TTCTRL, + OP_BURSTSIZE, OP_PORTSC, OP_DEVLC, OP_OTGSC, diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index ce0489754fde..50cd23b3b7f1 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -86,6 +86,7 @@ static const u8 ci_regs_nolpm[] = { [OP_DEVICEADDR] = 0x14U, [OP_ENDPTLISTADDR] = 0x18U, [OP_TTCTRL] = 0x1CU, + [OP_BURSTSIZE] = 0x20U, [OP_PORTSC] = 0x44U, [OP_DEVLC] = 0x84U, [OP_OTGSC] = 0x64U, @@ -109,6 +110,7 @@ static const u8 ci_regs_lpm[] = { [OP_DEVICEADDR] = 0x14U, [OP_ENDPTLISTADDR] = 0x18U, [OP_TTCTRL] = 0x1CU, + [OP_BURSTSIZE] = 0x20U, [OP_PORTSC] = 0x44U, [OP_DEVLC] = 0x84U, [OP_OTGSC] = 0xC4U, @@ -441,6 +443,17 @@ void ci_platform_configure(struct ci_hdrc *ci) if (ci->platdata->flags & CI_HDRC_OVERRIDE_AHB_BURST) hw_write_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK, ci->platdata->ahb_burst_config); + + /* override burst size, take effect only when ahb_burst_config is 0 */ + if (!hw_read_id_reg(ci, ID_SBUSCFG, AHBBRST_MASK)) { + if (ci->platdata->flags & CI_HDRC_OVERRIDE_TX_BURST) + hw_write(ci, OP_BURSTSIZE, TX_BURST_MASK, + ci->platdata->tx_burst_size << __ffs(TX_BURST_MASK)); + + if (ci->platdata->flags & CI_HDRC_OVERRIDE_RX_BURST) + hw_write(ci, OP_BURSTSIZE, RX_BURST_MASK, + ci->platdata->rx_burst_size); + } } /** @@ -647,6 +660,28 @@ static int ci_get_platdata(struct device *dev, platdata->flags |= CI_HDRC_OVERRIDE_AHB_BURST; } + if (of_find_property(dev->of_node, "tx-burst-size-dword", NULL)) { + ret = of_property_read_u32(dev->of_node, "tx-burst-size-dword", + &platdata->tx_burst_size); + if (ret) { + dev_err(dev, + "failed to get tx-burst-size-dword\n"); + return ret; + } + platdata->flags |= CI_HDRC_OVERRIDE_TX_BURST; + } + + if (of_find_property(dev->of_node, "rx-burst-size-dword", NULL)) { + ret = of_property_read_u32(dev->of_node, "rx-burst-size-dword", + &platdata->rx_burst_size); + if (ret) { + dev_err(dev, + "failed to get rx-burst-size-dword\n"); + return ret; + } + platdata->flags |= CI_HDRC_OVERRIDE_RX_BURST; + } + return 0; } |