83 static inline void pic32_spi_enable(struct pic32_spi_priv *priv)  in pic32_spi_enable()  argument
85 	writel(PIC32_SPI_CTRL_ON, &priv->regs->ctrl.set);  in pic32_spi_enable()
88 static inline void pic32_spi_disable(struct pic32_spi_priv *priv)  in pic32_spi_disable()  argument
90 	writel(PIC32_SPI_CTRL_ON, &priv->regs->ctrl.clr);  in pic32_spi_disable()
93 static inline u32 pic32_spi_rx_fifo_level(struct pic32_spi_priv *priv)  in pic32_spi_rx_fifo_level()  argument
95 	u32 sr = readl(&priv->regs->status.raw);  in pic32_spi_rx_fifo_level()
100 static inline u32 pic32_spi_tx_fifo_level(struct pic32_spi_priv *priv)  in pic32_spi_tx_fifo_level()  argument
102 	u32 sr = readl(&priv->regs->status.raw);  in pic32_spi_tx_fifo_level()
108 static u32 pic32_tx_max(struct pic32_spi_priv *priv, int n_bytes)  in pic32_tx_max()  argument
112 	tx_left = (priv->tx_end - priv->tx) / n_bytes;  in pic32_tx_max()
113 	tx_room = priv->fifo_n_word - pic32_spi_tx_fifo_level(priv);  in pic32_tx_max()
115 	rxtx_gap = (priv->rx_end - priv->rx) - (priv->tx_end - priv->tx);  in pic32_tx_max()
117 	return min3(tx_left, tx_room, (u32)(priv->fifo_n_word - rxtx_gap));  in pic32_tx_max()
121 static u32 pic32_rx_max(struct pic32_spi_priv *priv, int n_bytes)  in pic32_rx_max()  argument
123 	u32 rx_left = (priv->rx_end - priv->rx) / n_bytes;  in pic32_rx_max()
125 	return min_t(u32, rx_left, pic32_spi_rx_fifo_level(priv));  in pic32_rx_max()
129 static void pic32_spi_rx_##__name(struct pic32_spi_priv *priv)	\
132 	u32 mx = pic32_rx_max(priv, sizeof(__type));		\
135 		val = read##__bwl(&priv->regs->buf.raw);	\
136 		if (priv->rx_end - priv->len)			\
137 			*(__type *)(priv->rx) = val;		\
138 		priv->rx += sizeof(__type);			\
142 static void pic32_spi_tx_##__name(struct pic32_spi_priv *priv)	\
145 	u32 mx = pic32_tx_max(priv, sizeof(__type));		\
149 		if (priv->tx_end - priv->len)			\
150 			val =  *(__type *)(priv->tx);		\
151 		write##__bwl(val, &priv->regs->buf.raw);	\
152 		priv->tx += sizeof(__type);			\
159 static int pic32_spi_set_word_size(struct pic32_spi_priv *priv,  in pic32_spi_set_word_size()  argument
167 		priv->rx_fifo = pic32_spi_rx_byte;  in pic32_spi_set_word_size()
168 		priv->tx_fifo = pic32_spi_tx_byte;  in pic32_spi_set_word_size()
172 		priv->rx_fifo = pic32_spi_rx_word;  in pic32_spi_set_word_size()
173 		priv->tx_fifo = pic32_spi_tx_word;  in pic32_spi_set_word_size()
177 		priv->rx_fifo = pic32_spi_rx_dword;  in pic32_spi_set_word_size()
178 		priv->tx_fifo = pic32_spi_tx_dword;  in pic32_spi_set_word_size()
187 	val = readl(&priv->regs->ctrl.raw);  in pic32_spi_set_word_size()
190 	writel(val, &priv->regs->ctrl.raw);  in pic32_spi_set_word_size()
193 	priv->fifo_n_word = DIV_ROUND_UP(priv->fifo_depth, wordlen / 8);  in pic32_spi_set_word_size()
200 	struct pic32_spi_priv *priv = dev_get_priv(slave->parent);  in pic32_spi_claim_bus()  local
203 	pic32_spi_enable(priv);  in pic32_spi_claim_bus()
210 	struct pic32_spi_priv *priv = dev_get_priv(slave->parent);  in pic32_spi_release_bus()  local
213 	pic32_spi_disable(priv);  in pic32_spi_release_bus()
218 static void spi_cs_activate(struct pic32_spi_priv *priv)  in spi_cs_activate()  argument
220 	if (!dm_gpio_is_valid(&priv->cs_gpio))  in spi_cs_activate()
223 	dm_gpio_set_value(&priv->cs_gpio, 1);  in spi_cs_activate()
226 static void spi_cs_deactivate(struct pic32_spi_priv *priv)  in spi_cs_deactivate()  argument
228 	if (!dm_gpio_is_valid(&priv->cs_gpio))  in spi_cs_deactivate()
231 	dm_gpio_set_value(&priv->cs_gpio, 0);  in spi_cs_deactivate()
240 	struct pic32_spi_priv *priv;  in pic32_spi_xfer()  local
245 	priv = dev_get_priv(bus);  in pic32_spi_xfer()
255 		spi_cs_activate(priv);  in pic32_spi_xfer()
258 	priv->tx = tx_buf;  in pic32_spi_xfer()
259 	priv->rx = rx_buf;  in pic32_spi_xfer()
260 	priv->tx_end = priv->tx + len;  in pic32_spi_xfer()
261 	priv->rx_end = priv->rx + len;  in pic32_spi_xfer()
262 	priv->len = len;  in pic32_spi_xfer()
267 		priv->tx_fifo(priv);  in pic32_spi_xfer()
268 		priv->rx_fifo(priv);  in pic32_spi_xfer()
271 		if (priv->rx >= priv->rx_end) {  in pic32_spi_xfer()
286 		spi_cs_deactivate(priv);  in pic32_spi_xfer()
293 	struct pic32_spi_priv *priv = dev_get_priv(bus);  in pic32_spi_set_speed()  local
299 	div = (priv->clk_rate / 2 / speed) - 1;  in pic32_spi_set_speed()
301 	writel(div, &priv->regs->baud.raw);  in pic32_spi_set_speed()
303 	priv->speed_hz = speed;  in pic32_spi_set_speed()
310 	struct pic32_spi_priv *priv = dev_get_priv(bus);  in pic32_spi_set_mode()  local
316 	val = readl(&priv->regs->ctrl.raw);  in pic32_spi_set_mode()
331 	writel(val, &priv->regs->ctrl.raw);  in pic32_spi_set_mode()
333 	priv->mode = mode;  in pic32_spi_set_mode()
340 	struct pic32_spi_priv *priv = dev_get_priv(slave->parent);  in pic32_spi_set_wordlen()  local
342 	return pic32_spi_set_word_size(priv, wordlen);  in pic32_spi_set_wordlen()
345 static void pic32_spi_hw_init(struct pic32_spi_priv *priv)  in pic32_spi_hw_init()  argument
350 	pic32_spi_disable(priv);  in pic32_spi_hw_init()
352 	val = readl(&priv->regs->ctrl);  in pic32_spi_hw_init()
356 	priv->fifo_depth = 16;  in pic32_spi_hw_init()
370 	writel(val, &priv->regs->ctrl);  in pic32_spi_hw_init()
373 	writel(PIC32_SPI_STAT_RX_OV, &priv->regs->status.clr);  in pic32_spi_hw_init()
378 	struct pic32_spi_priv *priv = dev_get_priv(bus);  in pic32_spi_probe()  local
391 	priv->regs = ioremap(addr, size);  in pic32_spi_probe()
392 	if (!priv->regs)  in pic32_spi_probe()
403 	priv->clk_rate = clk_get_periph_rate(clkdev, ret);  in pic32_spi_probe()
406 	pic32_spi_hw_init(priv);  in pic32_spi_probe()
409 	pic32_spi_set_word_size(priv, SPI_DEFAULT_WORDLEN);  in pic32_spi_probe()
418 					 &priv->cs_gpio, GPIOD_IS_OUT);  in pic32_spi_probe()