49 static inline u32 ath79_spi_rr(struct ath79_spi *sp, unsigned int reg)  in ath79_spi_rr()  argument
51 	return ioread32(sp->base + reg);  in ath79_spi_rr()
54 static inline void ath79_spi_wr(struct ath79_spi *sp, unsigned int reg, u32 val)  in ath79_spi_wr()  argument
56 	iowrite32(val, sp->base + reg);  in ath79_spi_wr()
64 static inline void ath79_spi_delay(struct ath79_spi *sp, unsigned int nsecs)  in ath79_spi_delay()  argument
66 	if (nsecs > sp->rrw_delay)  in ath79_spi_delay()
67 		ndelay(nsecs - sp->rrw_delay);  in ath79_spi_delay()
72 	struct ath79_spi *sp = ath79_spidev_to_sp(spi);  in ath79_spi_chipselect()  local
77 		sp->ioc_base |= cs_bit;  in ath79_spi_chipselect()
79 		sp->ioc_base &= ~cs_bit;  in ath79_spi_chipselect()
81 	ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);  in ath79_spi_chipselect()
84 static void ath79_spi_enable(struct ath79_spi *sp)  in ath79_spi_enable()  argument
87 	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO);  in ath79_spi_enable()
90 	sp->reg_ctrl = ath79_spi_rr(sp, AR71XX_SPI_REG_CTRL);  in ath79_spi_enable()
91 	sp->ioc_base = ath79_spi_rr(sp, AR71XX_SPI_REG_IOC);  in ath79_spi_enable()
94 	sp->ioc_base &= ~(AR71XX_SPI_IOC_DO | AR71XX_SPI_IOC_CLK);  in ath79_spi_enable()
97 	ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, 0x43);  in ath79_spi_enable()
100 static void ath79_spi_disable(struct ath79_spi *sp)  in ath79_spi_disable()  argument
103 	ath79_spi_wr(sp, AR71XX_SPI_REG_CTRL, sp->reg_ctrl);  in ath79_spi_disable()
105 	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0);  in ath79_spi_disable()
111 	struct ath79_spi *sp = ath79_spidev_to_sp(spi);  in ath79_spi_txrx_mode0()  local
112 	u32 ioc = sp->ioc_base;  in ath79_spi_txrx_mode0()
124 		ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out);  in ath79_spi_txrx_mode0()
125 		ath79_spi_delay(sp, nsecs);  in ath79_spi_txrx_mode0()
126 		ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out | AR71XX_SPI_IOC_CLK);  in ath79_spi_txrx_mode0()
127 		ath79_spi_delay(sp, nsecs);  in ath79_spi_txrx_mode0()
129 			ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, out);  in ath79_spi_txrx_mode0()
134 	return ath79_spi_rr(sp, AR71XX_SPI_REG_RDS);  in ath79_spi_txrx_mode0()
140 	struct ath79_spi *sp = ath79_spidev_to_sp(mem->spi);  in ath79_exec_mem_op()  local
152 	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, 0);  in ath79_exec_mem_op()
154 	memcpy_fromio(op->data.buf.in, sp->base + op->addr.val, op->data.nbytes);  in ath79_exec_mem_op()
157 	ath79_spi_wr(sp, AR71XX_SPI_REG_FS, AR71XX_SPI_FS_GPIO);  in ath79_exec_mem_op()
160 	ath79_spi_wr(sp, AR71XX_SPI_REG_IOC, sp->ioc_base);  in ath79_exec_mem_op()
172 	struct ath79_spi *sp;  in ath79_spi_probe()  local
176 	host = spi_alloc_host(&pdev->dev, sizeof(*sp));  in ath79_spi_probe()
182 	sp = spi_controller_get_devdata(host);  in ath79_spi_probe()
184 	platform_set_drvdata(pdev, sp);  in ath79_spi_probe()
192 	sp->bitbang.master = host;  in ath79_spi_probe()
193 	sp->bitbang.chipselect = ath79_spi_chipselect;  in ath79_spi_probe()
194 	sp->bitbang.txrx_word[SPI_MODE_0] = ath79_spi_txrx_mode0;  in ath79_spi_probe()
195 	sp->bitbang.flags = SPI_CS_HIGH;  in ath79_spi_probe()
197 	sp->base = devm_platform_ioremap_resource(pdev, 0);  in ath79_spi_probe()
198 	if (IS_ERR(sp->base)) {  in ath79_spi_probe()
199 		ret = PTR_ERR(sp->base);  in ath79_spi_probe()
203 	sp->clk = devm_clk_get(&pdev->dev, "ahb");  in ath79_spi_probe()
204 	if (IS_ERR(sp->clk)) {  in ath79_spi_probe()
205 		ret = PTR_ERR(sp->clk);  in ath79_spi_probe()
209 	ret = clk_prepare_enable(sp->clk);  in ath79_spi_probe()
213 	rate = DIV_ROUND_UP(clk_get_rate(sp->clk), MHZ);  in ath79_spi_probe()
219 	sp->rrw_delay = ATH79_SPI_RRW_DELAY_FACTOR / rate;  in ath79_spi_probe()
221 		sp->rrw_delay);  in ath79_spi_probe()
223 	ath79_spi_enable(sp);  in ath79_spi_probe()
224 	ret = spi_bitbang_start(&sp->bitbang);  in ath79_spi_probe()
231 	ath79_spi_disable(sp);  in ath79_spi_probe()
233 	clk_disable_unprepare(sp->clk);  in ath79_spi_probe()
242 	struct ath79_spi *sp = platform_get_drvdata(pdev);  in ath79_spi_remove()  local
244 	spi_bitbang_stop(&sp->bitbang);  in ath79_spi_remove()
245 	ath79_spi_disable(sp);  in ath79_spi_remove()
246 	clk_disable_unprepare(sp->clk);  in ath79_spi_remove()
247 	spi_controller_put(sp->bitbang.master);  in ath79_spi_remove()