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usb: chipidea: add tx/rx burst size configuration interface

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The user can adjust it through dts or platform data

Signed-off-by: Peter Chen <peter.chen@freescale.com>
This commit is contained in:
Peter Chen 2015-03-17 17:32:45 +08:00
parent bd6e9d115d
commit 96625eadca
4 changed files with 44 additions and 0 deletions
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4
drivers/usb/chipidea/bits.h
View File

@ -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)

1
drivers/usb/chipidea/ci.h
View File

@ -51,6 +51,7 @@ enum ci_hw_regs {
OP_DEVICEADDR,
OP_ENDPTLISTADDR,
OP_TTCTRL,
OP_BURSTSIZE,
OP_PORTSC,
OP_DEVLC,
OP_OTGSC,

35
drivers/usb/chipidea/core.c
View File

@ -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;
}

4
include/linux/usb/chipidea.h
View File

@ -34,6 +34,8 @@ struct ci_hdrc_platform_data {
#define CI_HDRC_TURN_VBUS_EARLY_ON BIT(7)
#define CI_HDRC_SET_NON_ZERO_TTHA BIT(8)
#define CI_HDRC_OVERRIDE_AHB_BURST BIT(9)
#define CI_HDRC_OVERRIDE_TX_BURST BIT(10)
#define CI_HDRC_OVERRIDE_RX_BURST BIT(11)
enum usb_dr_mode dr_mode;
#define CI_HDRC_CONTROLLER_RESET_EVENT 0
#define CI_HDRC_CONTROLLER_STOPPED_EVENT 1
@ -43,6 +45,8 @@ struct ci_hdrc_platform_data {
/* interrupt threshold setting */
u32 itc_setting;
u32 ahb_burst_config;
u32 tx_burst_size;
u32 rx_burst_size;
};
/* Default offset of capability registers */