45 static inline u32 ath79_spi_rr(struct ath79_spi *sp, unsigned reg)  in ath79_spi_rr()  argument
47 	return ioread32(sp->base + reg);  in ath79_spi_rr()
50 static inline void ath79_spi_wr(struct ath79_spi *sp, unsigned reg, u32 val)  in ath79_spi_wr()  argument
52 	iowrite32(val, sp->base + reg);  in ath79_spi_wr()
60 static inline void ath79_spi_delay(struct ath79_spi *sp, unsigned nsecs)  in ath79_spi_delay()  argument
62 	if (nsecs > sp->rrw_delay)  in ath79_spi_delay()
63 		ndelay(nsecs - sp->rrw_delay);  in ath79_spi_delay()
68 	struct ath79_spi *sp = ath79_spidev_to_sp(spi);  in ath79_spi_chipselect()  local
74 			sp->ioc_base |= AR71XX_SPI_IOC_CLK;  in ath79_spi_chipselect()
76 			sp->ioc_base &= ~AR71XX_SPI_IOC_CLK;  in ath79_spi_chipselect()
78 		ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);  in ath79_spi_chipselect()
86 			sp->ioc_base |= AR71XX_SPI_IOC_CS0;  in ath79_spi_chipselect()
88 			sp->ioc_base &= ~AR71XX_SPI_IOC_CS0;  in ath79_spi_chipselect()
90 		ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);  in ath79_spi_chipselect()
95 static void ath79_spi_enable(struct ath79_spi *sp)  in ath79_spi_enable()  argument
98 	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO);  in ath79_spi_enable()
101 	sp->reg_ctrl = ath79_spi_rr(sp, AR71XX_SPI_REG_CTRL);  in ath79_spi_enable()
102 	sp->ioc_base = ath79_spi_rr(sp, AR71XX_SPI_REG_IOC);  in ath79_spi_enable()
105 	ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, 0x43);  in ath79_spi_enable()
108 static void ath79_spi_disable(struct ath79_spi *sp)  in ath79_spi_disable()  argument
111 	ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, sp->reg_ctrl);  in ath79_spi_disable()
113 	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0);  in ath79_spi_disable()
118 	struct ath79_spi *sp = ath79_spidev_to_sp(spi);  in ath79_spi_setup_cs()  local
138 			sp->ioc_base &= ~AR71XX_SPI_IOC_CS0;  in ath79_spi_setup_cs()
140 			sp->ioc_base |= AR71XX_SPI_IOC_CS0;  in ath79_spi_setup_cs()
142 		ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);  in ath79_spi_setup_cs()
181 	struct ath79_spi *sp = ath79_spidev_to_sp(spi);  in ath79_spi_txrx_mode0()  local
182 	u32 ioc = sp->ioc_base;  in ath79_spi_txrx_mode0()
194 		ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out);  in ath79_spi_txrx_mode0()
195 		ath79_spi_delay(sp, nsecs);  in ath79_spi_txrx_mode0()
196 		ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out | AR71XX_SPI_IOC_CLK);  in ath79_spi_txrx_mode0()
197 		ath79_spi_delay(sp, nsecs);  in ath79_spi_txrx_mode0()
199 			ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out);  in ath79_spi_txrx_mode0()
204 	return ath79_spi_rr(sp, AR71XX_SPI_REG_RDS);  in ath79_spi_txrx_mode0()
210 	struct ath79_spi *sp;  in ath79_spi_probe()  local
216 	master = spi_alloc_master(&pdev->dev, sizeof(*sp));  in ath79_spi_probe()
222 	sp = spi_master_get_devdata(master);  in ath79_spi_probe()
224 	platform_set_drvdata(pdev, sp);  in ath79_spi_probe()
236 	sp->bitbang.master = master;  in ath79_spi_probe()
237 	sp->bitbang.chipselect = ath79_spi_chipselect;  in ath79_spi_probe()
238 	sp->bitbang.txrx_word[SPI_MODE_0] = ath79_spi_txrx_mode0;  in ath79_spi_probe()
239 	sp->bitbang.setup_transfer = spi_bitbang_setup_transfer;  in ath79_spi_probe()
240 	sp->bitbang.flags = SPI_CS_HIGH;  in ath79_spi_probe()
243 	sp->base = devm_ioremap_resource(&pdev->dev, r);  in ath79_spi_probe()
244 	if (IS_ERR(sp->base)) {  in ath79_spi_probe()
245 		ret = PTR_ERR(sp->base);  in ath79_spi_probe()
249 	sp->clk = devm_clk_get(&pdev->dev, "ahb");  in ath79_spi_probe()
250 	if (IS_ERR(sp->clk)) {  in ath79_spi_probe()
251 		ret = PTR_ERR(sp->clk);  in ath79_spi_probe()
255 	ret = clk_prepare_enable(sp->clk);  in ath79_spi_probe()
259 	rate = DIV_ROUND_UP(clk_get_rate(sp->clk), MHZ);  in ath79_spi_probe()
265 	sp->rrw_delay = ATH79_SPI_RRW_DELAY_FACTOR / rate;  in ath79_spi_probe()
267 		sp->rrw_delay);  in ath79_spi_probe()
269 	ath79_spi_enable(sp);  in ath79_spi_probe()
270 	ret = spi_bitbang_start(&sp->bitbang);  in ath79_spi_probe()
277 	ath79_spi_disable(sp);  in ath79_spi_probe()
279 	clk_disable_unprepare(sp->clk);  in ath79_spi_probe()
281 	spi_master_put(sp->bitbang.master);  in ath79_spi_probe()
288 	struct ath79_spi *sp = platform_get_drvdata(pdev);  in ath79_spi_remove()  local
290 	spi_bitbang_stop(&sp->bitbang);  in ath79_spi_remove()
291 	ath79_spi_disable(sp);  in ath79_spi_remove()
292 	clk_disable_unprepare(sp->clk);  in ath79_spi_remove()
293 	spi_master_put(sp->bitbang.master);  in ath79_spi_remove()