Lines Matching +full:rx +full:- +full:ping +full:- +full:pong
1 // SPDX-License-Identifier: GPL-2.0+
5 * Derived from linux/drivers/spi/spi-bcm63xx-hsspi.c:
6 * Copyright (C) 2000-2010 Broadcom Corporation
7 * Copyright (C) 2012-2013 Jonas Gorski <jogo@openwrt.org>
38 /* SPI Ping-Pong Command registers */
47 /* SPI Ping-Pong Status registers */
79 /* SPI Ping-Pong FIFO registers */
84 /* SPI Ping-Pong FIFO OP register */
109 if (cs >= priv->num_cs) { in bcm63xx_hsspi_cs_info()
111 return -ENODEV; in bcm63xx_hsspi_cs_info()
123 setbits_be32(priv->regs + SPI_CTL_REG, SPI_CTL_CLK_POL_MASK); in bcm63xx_hsspi_set_mode()
125 clrbits_be32(priv->regs + SPI_CTL_REG, SPI_CTL_CLK_POL_MASK); in bcm63xx_hsspi_set_mode()
134 priv->speed = speed; in bcm63xx_hsspi_set_speed()
145 set = DIV_ROUND_UP(priv->clk_rate, priv->speed); in bcm63xx_hsspi_activate_cs()
149 writel_be(set, priv->regs + SPI_PFL_CLK_REG(plat->cs)); in bcm63xx_hsspi_activate_cs()
158 if (plat->mode & SPI_CPHA) in bcm63xx_hsspi_activate_cs()
164 if (priv->speed > SPI_MAX_SYNC_CLOCK) in bcm63xx_hsspi_activate_cs()
167 clrsetbits_be32(priv->regs + SPI_PFL_SIG_REG(plat->cs), clr, set); in bcm63xx_hsspi_activate_cs()
174 if (priv->cs_pols & BIT(plat->cs)) in bcm63xx_hsspi_activate_cs()
175 clr |= BIT(plat->cs); in bcm63xx_hsspi_activate_cs()
177 set |= BIT(plat->cs); in bcm63xx_hsspi_activate_cs()
180 if (priv->cs_pols & BIT(!plat->cs)) in bcm63xx_hsspi_activate_cs()
181 clr |= BIT(!plat->cs); in bcm63xx_hsspi_activate_cs()
183 set |= BIT(!plat->cs); in bcm63xx_hsspi_activate_cs()
185 clrsetbits_be32(priv->regs + SPI_CTL_REG, clr, set); in bcm63xx_hsspi_activate_cs()
191 clrsetbits_be32(priv->regs + SPI_CTL_REG, SPI_CTL_CS_POL_MASK, in bcm63xx_hsspi_deactivate_cs()
192 priv->cs_pols); in bcm63xx_hsspi_deactivate_cs()
200 * SPI-connected flashes since reading requires prepending a write transfer of
216 struct bcm63xx_hsspi_priv *priv = dev_get_priv(dev->parent); in bcm63xx_hsspi_xfer()
223 uint8_t *rx = din; in bcm63xx_hsspi_xfer() local
229 if (tx && rx) in bcm63xx_hsspi_xfer()
231 else if (rx) in bcm63xx_hsspi_xfer()
237 step_size -= HSSPI_FIFO_OP_SIZE; in bcm63xx_hsspi_xfer()
240 if ((opcode == HSSPI_FIFO_OP_CODE_R && plat->mode == SPI_RX_DUAL) || in bcm63xx_hsspi_xfer()
241 (opcode == HSSPI_FIFO_OP_CODE_W && plat->mode == SPI_TX_DUAL)) in bcm63xx_hsspi_xfer()
248 if (plat->mode & SPI_3WIRE) in bcm63xx_hsspi_xfer()
250 writel_be(val, priv->regs + SPI_PFL_MODE_REG(plat->cs)); in bcm63xx_hsspi_xfer()
259 memcpy_toio(priv->regs + HSSPI_FIFO_BASE + in bcm63xx_hsspi_xfer()
266 priv->regs + HSSPI_FIFO_OP_REG); in bcm63xx_hsspi_xfer()
270 val |= (plat->cs << SPI_CMD_PFL_SHIFT) & in bcm63xx_hsspi_xfer()
272 val |= (!plat->cs << SPI_CMD_SLAVE_SHIFT) & in bcm63xx_hsspi_xfer()
274 writel_be(val, priv->regs + SPI_CMD_REG); in bcm63xx_hsspi_xfer()
277 ret = wait_for_bit_be32(priv->regs + SPI_STAT_REG, in bcm63xx_hsspi_xfer()
285 /* copy rx data */ in bcm63xx_hsspi_xfer()
286 if (rx) { in bcm63xx_hsspi_xfer()
287 memcpy_fromio(rx, priv->regs + HSSPI_FIFO_BASE, in bcm63xx_hsspi_xfer()
289 rx += curr_step; in bcm63xx_hsspi_xfer()
292 data_bytes -= curr_step; in bcm63xx_hsspi_xfer()
309 { .compatible = "brcm,bcm6328-hsspi", },
315 struct bcm63xx_hsspi_priv *priv = dev_get_priv(dev->parent); in bcm63xx_hsspi_child_pre_probe()
319 if (plat->cs >= priv->num_cs) { in bcm63xx_hsspi_child_pre_probe()
320 printf("no cs %u\n", plat->cs); in bcm63xx_hsspi_child_pre_probe()
321 return -ENODEV; in bcm63xx_hsspi_child_pre_probe()
325 if (plat->mode & SPI_CS_HIGH) in bcm63xx_hsspi_child_pre_probe()
326 priv->cs_pols |= BIT(plat->cs); in bcm63xx_hsspi_child_pre_probe()
328 priv->cs_pols &= ~BIT(plat->cs); in bcm63xx_hsspi_child_pre_probe()
340 priv->regs = dev_remap_addr(dev); in bcm63xx_hsspi_probe()
341 if (!priv->regs) in bcm63xx_hsspi_probe()
342 return -EINVAL; in bcm63xx_hsspi_probe()
344 priv->num_cs = dev_read_u32_default(dev, "num-cs", 8); in bcm63xx_hsspi_probe()
364 priv->clk_rate = clk_get_rate(&clk); in bcm63xx_hsspi_probe()
384 writel_be(0, priv->regs + SPI_IR_MASK_REG); in bcm63xx_hsspi_probe()
387 writel_be(SPI_IR_CLEAR_ALL, priv->regs + SPI_IR_STAT_REG); in bcm63xx_hsspi_probe()
390 setbits_be32(priv->regs + SPI_CTL_REG, SPI_CTL_CLK_GATE_MASK); in bcm63xx_hsspi_probe()
393 priv->cs_pols = readl_be(priv->regs + SPI_CTL_REG) & in bcm63xx_hsspi_probe()