| H A D | spi-sh-hspi.c | 54 static void hspi_write(struct hspi_priv *hspi, int reg, u32 val) hspi_write() argument
56 iowrite32(val, hspi->addr + reg); hspi_write()
59 static u32 hspi_read(struct hspi_priv *hspi, int reg) hspi_read() argument
61 return ioread32(hspi->addr + reg); hspi_read()
64 static void hspi_bit_set(struct hspi_priv *hspi, int reg, u32 mask, u32 set) hspi_bit_set() argument
66 u32 val = hspi_read(hspi, reg); hspi_bit_set()
71 hspi_write(hspi, reg, val); hspi_bit_set()
77 static int hspi_status_check_timeout(struct hspi_priv *hspi, u32 mask, u32 val) hspi_status_check_timeout() argument
82 if ((mask & hspi_read(hspi, SPSR)) == val) hspi_status_check_timeout()
88 dev_err(hspi->dev, "timeout\n"); hspi_status_check_timeout()
96 #define hspi_hw_cs_enable(hspi) hspi_hw_cs_ctrl(hspi, 0)
97 #define hspi_hw_cs_disable(hspi) hspi_hw_cs_ctrl(hspi, 1) hspi_hw_cs_ctrl()
98 static void hspi_hw_cs_ctrl(struct hspi_priv *hspi, int hi) hspi_hw_cs_ctrl() argument
100 hspi_bit_set(hspi, SPSCR, (1 << 6), (hi) << 6); hspi_hw_cs_ctrl()
103 static void hspi_hw_setup(struct hspi_priv *hspi, hspi_hw_setup() argument
108 struct device *dev = hspi->dev; hspi_hw_setup()
119 rate = clk_get_rate(hspi->clk); hspi_hw_setup()
146 hspi_write(hspi, SPCR, spcr); hspi_hw_setup()
147 hspi_write(hspi, SPSR, 0x0); hspi_hw_setup()
148 hspi_write(hspi, SPSCR, 0x21); /* master mode / CS control */ hspi_hw_setup()
154 struct hspi_priv *hspi = spi_master_get_devdata(master); hspi_transfer_one_message() local
162 dev_dbg(hspi->dev, "%s\n", __func__); hspi_transfer_one_message()
169 hspi_hw_setup(hspi, msg, t); hspi_transfer_one_message()
170 hspi_hw_cs_enable(hspi); hspi_transfer_one_message()
178 ret = hspi_status_check_timeout(hspi, 0x1, 0); hspi_transfer_one_message()
186 hspi_write(hspi, SPTBR, tx); hspi_transfer_one_message()
189 ret = hspi_status_check_timeout(hspi, 0x4, 0x4); hspi_transfer_one_message()
193 rx = hspi_read(hspi, SPRBR); hspi_transfer_one_message()
206 hspi_hw_cs_disable(hspi); hspi_transfer_one_message()
214 hspi_hw_cs_disable(hspi); hspi_transfer_one_message()
225 struct hspi_priv *hspi; hspi_probe() local
236 master = spi_alloc_master(&pdev->dev, sizeof(*hspi)); hspi_probe()
249 hspi = spi_master_get_devdata(master); hspi_probe()
250 platform_set_drvdata(pdev, hspi); hspi_probe()
252 /* init hspi */ hspi_probe()
253 hspi->master = master; hspi_probe()
254 hspi->dev = &pdev->dev; hspi_probe()
255 hspi->clk = clk; hspi_probe()
256 hspi->addr = devm_ioremap(hspi->dev, hspi_probe()
258 if (!hspi->addr) { hspi_probe()
293 struct hspi_priv *hspi = platform_get_drvdata(pdev); hspi_remove() local
297 clk_put(hspi->clk); hspi_remove()
303 { .compatible = "renesas,hspi", },
312 .name = "sh-hspi",
321 MODULE_ALIAS("platform:sh-hspi");
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