78 static int pl022_is_supported(struct pl022_spi_slave *ps)  in pl022_is_supported()  argument
81 	if ((readw(ps->base + SSP_PID0) == 0x22) &&  in pl022_is_supported()
82 	    (readw(ps->base + SSP_PID1) == 0x10) &&  in pl022_is_supported()
83 	    ((readw(ps->base + SSP_PID2) & 0xf) == 0x04) &&  in pl022_is_supported()
84 	    (readw(ps->base + SSP_PID3) == 0x00))  in pl022_is_supported()
93 	struct pl022_spi_slave *ps = dev_get_priv(bus);  in pl022_spi_probe()  local
95 	ps->base = ioremap(plat->addr, plat->size);  in pl022_spi_probe()
96 	ps->freq = plat->freq;  in pl022_spi_probe()
99 	if (!pl022_is_supported(ps))  in pl022_spi_probe()
103 	writew(SSP_CR0_BIT_MODE(8), ps->base + SSP_CR0);  in pl022_spi_probe()
104 	writew(DFLT_PRESCALE, ps->base + SSP_CPSR);  in pl022_spi_probe()
109 static void flush(struct pl022_spi_slave *ps)  in flush()  argument
112 		while (readw(ps->base + SSP_SR) & SSP_SR_MASK_RNE)  in flush()
113 			readw(ps->base + SSP_DR);  in flush()
114 	} while (readw(ps->base + SSP_SR) & SSP_SR_MASK_BSY);  in flush()
120 	struct pl022_spi_slave *ps = dev_get_priv(bus);  in pl022_spi_claim_bus()  local
124 	reg = readw(ps->base + SSP_CR1);  in pl022_spi_claim_bus()
126 	writew(reg, ps->base + SSP_CR1);  in pl022_spi_claim_bus()
128 	flush(ps);  in pl022_spi_claim_bus()
136 	struct pl022_spi_slave *ps = dev_get_priv(bus);  in pl022_spi_release_bus()  local
139 	flush(ps);  in pl022_spi_release_bus()
142 	reg = readw(ps->base + SSP_CR1);  in pl022_spi_release_bus()
144 	writew(reg, ps->base + SSP_CR1);  in pl022_spi_release_bus()
153 	struct pl022_spi_slave *ps = dev_get_priv(bus);  in pl022_spi_xfer()  local
180 		if (readw(ps->base + SSP_SR) & SSP_SR_MASK_TNF) {  in pl022_spi_xfer()
182 			writew(value, ps->base + SSP_DR);  in pl022_spi_xfer()
186 		if (readw(ps->base + SSP_SR) & SSP_SR_MASK_RNE) {  in pl022_spi_xfer()
187 			value = readw(ps->base + SSP_DR);  in pl022_spi_xfer()
195 		if (readw(ps->base + SSP_SR) & SSP_SR_MASK_RNE) {  in pl022_spi_xfer()
196 			value = readw(ps->base + SSP_DR);  in pl022_spi_xfer()
213 	struct pl022_spi_slave *ps = dev_get_priv(bus);  in pl022_spi_set_speed()  local
217 	u32 rate = ps->freq;  in pl022_spi_set_speed()
250 	writew(best_cpsr, ps->base + SSP_CPSR);  in pl022_spi_set_speed()
251 	cr0 = readw(ps->base + SSP_CR0);  in pl022_spi_set_speed()
252 	writew(cr0 | (best_scr << SSP_SCR_SHFT), ps->base + SSP_CR0);  in pl022_spi_set_speed()
259 	struct pl022_spi_slave *ps = dev_get_priv(bus);  in pl022_spi_set_mode()  local
262 	reg = readw(ps->base + SSP_CR0);  in pl022_spi_set_mode()
268 	writew(reg, ps->base + SSP_CR0);  in pl022_spi_set_mode()