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usb: gadget: at91_udc: Rework for multi-platform kernel support
cpu_is_at91xxx are a set of macros defined in mach/cpu.h and are here used to detect the SoC we are booting on. Use compatible string + a caps structure to replace those cpu_is_xxx tests. Remove all mach and asm headers (which are now unused). Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Acked-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
This commit is contained in:
Boris Brezillon
Nicolas Ferre
parent
422cde259a
commit
f0bceab4e3
@ -31,16 +31,9 @@
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#include <linux/of.h>
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#include <linux/of_gpio.h>
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#include <linux/platform_data/atmel.h>
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#include <asm/byteorder.h>
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#include <mach/hardware.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/gpio.h>
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#include <mach/cpu.h>
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#include <mach/at91sam9261_matrix.h>
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#include <mach/at91_matrix.h>
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#include <linux/regmap.h>
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#include <linux/mfd/syscon.h>
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#include <linux/mfd/syscon/atmel-matrix.h>
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#include "at91_udc.h"
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@ -915,8 +908,6 @@ static void clk_off(struct at91_udc *udc)
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*/
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static void pullup(struct at91_udc *udc, int is_on)
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{
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int active = !udc->board.pullup_active_low;
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if (!udc->enabled || !udc->vbus)
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is_on = 0;
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DBG("%sactive\n", is_on ? "" : "in");
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@ -925,40 +916,15 @@ static void pullup(struct at91_udc *udc, int is_on)
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clk_on(udc);
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at91_udp_write(udc, AT91_UDP_ICR, AT91_UDP_RXRSM);
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at91_udp_write(udc, AT91_UDP_TXVC, 0);
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if (cpu_is_at91rm9200())
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gpio_set_value(udc->board.pullup_pin, active);
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else if (cpu_is_at91sam9260() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) {
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u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC);
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txvc |= AT91_UDP_TXVC_PUON;
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at91_udp_write(udc, AT91_UDP_TXVC, txvc);
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} else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) {
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u32 usbpucr;
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usbpucr = at91_matrix_read(AT91_MATRIX_USBPUCR);
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usbpucr |= AT91_MATRIX_USBPUCR_PUON;
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at91_matrix_write(AT91_MATRIX_USBPUCR, usbpucr);
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}
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} else {
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stop_activity(udc);
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at91_udp_write(udc, AT91_UDP_IDR, AT91_UDP_RXRSM);
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at91_udp_write(udc, AT91_UDP_TXVC, AT91_UDP_TXVC_TXVDIS);
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if (cpu_is_at91rm9200())
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gpio_set_value(udc->board.pullup_pin, !active);
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else if (cpu_is_at91sam9260() || cpu_is_at91sam9263() || cpu_is_at91sam9g20()) {
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u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC);
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txvc &= ~AT91_UDP_TXVC_PUON;
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at91_udp_write(udc, AT91_UDP_TXVC, txvc);
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} else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) {
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u32 usbpucr;
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usbpucr = at91_matrix_read(AT91_MATRIX_USBPUCR);
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usbpucr &= ~AT91_MATRIX_USBPUCR_PUON;
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at91_matrix_write(AT91_MATRIX_USBPUCR, usbpucr);
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}
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clk_off(udc);
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}
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if (udc->caps && udc->caps->pullup)
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udc->caps->pullup(udc, is_on);
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}
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/* vbus is here! turn everything on that's ready */
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@ -1683,12 +1649,202 @@ static void at91udc_shutdown(struct platform_device *dev)
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spin_unlock_irqrestore(&udc->lock, flags);
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}
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static void at91udc_of_init(struct at91_udc *udc,
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struct device_node *np)
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static int at91rm9200_udc_init(struct at91_udc *udc)
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{
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struct at91_ep *ep;
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int ret;
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int i;
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for (i = 0; i < NUM_ENDPOINTS; i++) {
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ep = &udc->ep[i];
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switch (i) {
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case 0:
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case 3:
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ep->maxpacket = 8;
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break;
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case 1 ... 2:
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ep->maxpacket = 64;
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break;
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case 4 ... 5:
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ep->maxpacket = 256;
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break;
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}
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}
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if (!gpio_is_valid(udc->board.pullup_pin)) {
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DBG("no D+ pullup?\n");
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return -ENODEV;
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}
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ret = devm_gpio_request(&udc->pdev->dev, udc->board.pullup_pin,
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"udc_pullup");
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if (ret) {
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DBG("D+ pullup is busy\n");
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return ret;
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}
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gpio_direction_output(udc->board.pullup_pin,
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udc->board.pullup_active_low);
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return 0;
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}
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static void at91rm9200_udc_pullup(struct at91_udc *udc, int is_on)
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{
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int active = !udc->board.pullup_active_low;
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if (is_on)
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gpio_set_value(udc->board.pullup_pin, active);
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else
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gpio_set_value(udc->board.pullup_pin, !active);
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}
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static const struct at91_udc_caps at91rm9200_udc_caps = {
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.init = at91rm9200_udc_init,
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.pullup = at91rm9200_udc_pullup,
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};
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static int at91sam9260_udc_init(struct at91_udc *udc)
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{
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struct at91_ep *ep;
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int i;
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for (i = 0; i < NUM_ENDPOINTS; i++) {
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ep = &udc->ep[i];
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switch (i) {
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case 0 ... 3:
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ep->maxpacket = 64;
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break;
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case 4 ... 5:
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ep->maxpacket = 512;
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break;
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}
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}
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return 0;
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}
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static void at91sam9260_udc_pullup(struct at91_udc *udc, int is_on)
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{
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u32 txvc = at91_udp_read(udc, AT91_UDP_TXVC);
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if (is_on)
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txvc |= AT91_UDP_TXVC_PUON;
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else
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txvc &= ~AT91_UDP_TXVC_PUON;
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at91_udp_write(udc, AT91_UDP_TXVC, txvc);
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}
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static const struct at91_udc_caps at91sam9260_udc_caps = {
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.init = at91sam9260_udc_init,
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.pullup = at91sam9260_udc_pullup,
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};
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static int at91sam9261_udc_init(struct at91_udc *udc)
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{
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struct at91_ep *ep;
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int i;
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for (i = 0; i < NUM_ENDPOINTS; i++) {
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ep = &udc->ep[i];
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switch (i) {
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case 0:
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ep->maxpacket = 8;
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break;
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case 1 ... 3:
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ep->maxpacket = 64;
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break;
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case 4 ... 5:
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ep->maxpacket = 256;
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break;
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}
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}
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udc->matrix = syscon_regmap_lookup_by_phandle(udc->pdev->dev.of_node,
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"atmel,matrix");
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if (IS_ERR(udc->matrix))
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return PTR_ERR(udc->matrix);
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return 0;
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}
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static void at91sam9261_udc_pullup(struct at91_udc *udc, int is_on)
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{
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u32 usbpucr = 0;
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if (is_on)
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usbpucr = AT91_MATRIX_USBPUCR_PUON;
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regmap_update_bits(udc->matrix, AT91SAM9261_MATRIX_USBPUCR,
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AT91_MATRIX_USBPUCR_PUON, usbpucr);
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}
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static const struct at91_udc_caps at91sam9261_udc_caps = {
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.init = at91sam9261_udc_init,
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.pullup = at91sam9261_udc_pullup,
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};
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static int at91sam9263_udc_init(struct at91_udc *udc)
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{
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struct at91_ep *ep;
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int i;
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for (i = 0; i < NUM_ENDPOINTS; i++) {
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ep = &udc->ep[i];
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switch (i) {
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case 0:
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case 1:
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case 2:
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case 3:
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ep->maxpacket = 64;
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break;
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case 4:
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case 5:
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ep->maxpacket = 256;
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break;
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}
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}
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return 0;
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}
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static const struct at91_udc_caps at91sam9263_udc_caps = {
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.init = at91sam9263_udc_init,
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.pullup = at91sam9260_udc_pullup,
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};
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static const struct of_device_id at91_udc_dt_ids[] = {
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{
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.compatible = "atmel,at91rm9200-udc",
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.data = &at91rm9200_udc_caps,
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},
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{
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.compatible = "atmel,at91sam9260-udc",
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.data = &at91sam9260_udc_caps,
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},
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{
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.compatible = "atmel,at91sam9261-udc",
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.data = &at91sam9261_udc_caps,
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},
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{
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.compatible = "atmel,at91sam9263-udc",
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.data = &at91sam9263_udc_caps,
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},
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, at91_udc_dt_ids);
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static void at91udc_of_init(struct at91_udc *udc, struct device_node *np)
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{
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struct at91_udc_data *board = &udc->board;
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u32 val;
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const struct of_device_id *match;
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enum of_gpio_flags flags;
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u32 val;
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if (of_property_read_u32(np, "atmel,vbus-polled", &val) == 0)
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board->vbus_polled = 1;
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@ -1701,6 +1857,10 @@ static void at91udc_of_init(struct at91_udc *udc,
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&flags);
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board->pullup_active_low = (flags & OF_GPIO_ACTIVE_LOW) ? 1 : 0;
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match = of_match_node(at91_udc_dt_ids, np);
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if (match)
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udc->caps = match->data;
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}
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static int at91udc_probe(struct platform_device *pdev)
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@ -1709,6 +1869,8 @@ static int at91udc_probe(struct platform_device *pdev)
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struct at91_udc *udc;
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int retval;
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struct resource *res;
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struct at91_ep *ep;
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int i;
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/* init software state */
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udc = &controller;
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@ -1718,40 +1880,19 @@ static int at91udc_probe(struct platform_device *pdev)
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udc->enabled = 0;
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spin_lock_init(&udc->lock);
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/* rm9200 needs manual D+ pullup; off by default */
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if (cpu_is_at91rm9200()) {
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if (!gpio_is_valid(udc->board.pullup_pin)) {
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DBG("no D+ pullup?\n");
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return -ENODEV;
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}
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retval = devm_gpio_request(dev, udc->board.pullup_pin,
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"udc_pullup");
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if (retval) {
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DBG("D+ pullup is busy\n");
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return retval;
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}
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gpio_direction_output(udc->board.pullup_pin,
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udc->board.pullup_active_low);
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}
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/* newer chips have more FIFO memory than rm9200 */
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if (cpu_is_at91sam9260() || cpu_is_at91sam9g20()) {
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udc->ep[0].maxpacket = 64;
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udc->ep[3].maxpacket = 64;
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udc->ep[4].maxpacket = 512;
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udc->ep[5].maxpacket = 512;
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} else if (cpu_is_at91sam9261() || cpu_is_at91sam9g10()) {
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udc->ep[3].maxpacket = 64;
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} else if (cpu_is_at91sam9263()) {
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udc->ep[0].maxpacket = 64;
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udc->ep[3].maxpacket = 64;
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}
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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udc->udp_baseaddr = devm_ioremap_resource(dev, res);
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if (IS_ERR(udc->udp_baseaddr))
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return PTR_ERR(udc->udp_baseaddr);
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if (udc->caps && udc->caps->init) {
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retval = udc->caps->init(udc);
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if (retval)
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return retval;
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}
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udc_reinit(udc);
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/* get interface and function clocks */
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@ -1920,13 +2061,6 @@ static int at91udc_resume(struct platform_device *pdev)
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#define at91udc_resume NULL
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#endif
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static const struct of_device_id at91_udc_dt_ids[] = {
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{ .compatible = "atmel,at91rm9200-udc" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, at91_udc_dt_ids);
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static struct platform_driver at91_udc_driver = {
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.remove = __exit_p(at91udc_remove),
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.shutdown = at91udc_shutdown,
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@ -107,6 +107,11 @@ struct at91_ep {
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unsigned fifo_bank:1;
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};
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struct at91_udc_caps {
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int (*init)(struct at91_udc *udc);
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void (*pullup)(struct at91_udc *udc, int is_on);
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};
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/*
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* driver is non-SMP, and just blocks IRQs whenever it needs
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* access protection for chip registers or driver state
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@ -115,6 +120,7 @@ struct at91_udc {
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struct usb_gadget gadget;
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struct at91_ep ep[NUM_ENDPOINTS];
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struct usb_gadget_driver *driver;
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const struct at91_udc_caps *caps;
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unsigned vbus:1;
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unsigned enabled:1;
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unsigned clocked:1;
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@ -134,6 +140,7 @@ struct at91_udc {
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spinlock_t lock;
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struct timer_list vbus_timer;
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struct work_struct vbus_timer_work;
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struct regmap *matrix;
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};
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static inline struct at91_udc *to_udc(struct usb_gadget *g)
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