mirror of
https://github.com/apache/nuttx.git
synced 2026-06-08 18:37:46 +08:00
arch/arm/src/lpc54xx: Add fragmenenty skeleon of SPI driver just as a starting point.
This commit is contained in:
Gregory Nutt
@@ -66,6 +66,8 @@
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#include "lpc54_config.h"
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#include "lpc54_i2c_master.h"
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#include <arch/board/board.h>
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#ifdef HAVE_SPI_MASTER_DEVICE
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/****************************************************************************
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@@ -79,9 +81,9 @@
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struct lpc54_i2cdev_s
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{
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struct i2c_master_s dev; /* Generic I2C device */
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unsigned int base; /* Base address of registers */
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uint16_t irqid; /* IRQ for this device */
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uint32_t inclck; /* I2C input clock frequency */
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uintptr_t base; /* Base address of Flexcomm registers */
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uint16_t irq; /* Flexcomm IRQ number */
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uint32_t fclock; /* Flexcomm function clock frequency */
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sem_t exclsem; /* Only one thread can access at a time */
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sem_t waitsem; /* Supports wait for state machine completion */
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@@ -96,13 +98,6 @@ struct lpc54_i2cdev_s
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uint16_t rdcnt; /* number of bytes read from rx fifo */
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};
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#ifdef CONFIG_LPC54_I2C0_MASTER
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static struct lpc54_i2cdev_s g_i2c0_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C1_MASTER
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static struct lpc54_i2cdev_s g_i2c1_dev;
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#endif
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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@@ -131,6 +126,37 @@ struct i2c_ops_s lpc54_i2c_ops =
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#endif
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};
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#ifdef CONFIG_LPC54_I2C0_MASTER
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static struct lpc54_i2cdev_s g_i2c0_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C1_MASTER
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static struct lpc54_i2cdev_s g_i2c1_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C2_MASTER
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static struct lpc54_i2cdev_s g_i2c2_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C3_MASTER
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static struct lpc54_i2cdev_s g_i2c3_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C4_MASTER
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static struct lpc54_i2cdev_s g_i2c4_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C5_MASTER
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static struct lpc54_i2cdev_s g_i2c5_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C6_MASTER
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static struct lpc54_i2cdev_s g_i2c6_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C7_MASTER
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static struct lpc54_i2cdev_s g_i2c7_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C8_MASTER
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static struct lpc54_i2cdev_s g_i2c8_dev;
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#endif
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#ifdef CONFIG_LPC54_I2C9_MASTER
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static struct lpc54_i2cdev_s g_i2c9_dev;
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#endif
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/****************************************************************************
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* Name: lpc54_i2c_setfrequency
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*
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@@ -149,7 +175,7 @@ static void lpc54_i2c_setfrequency(struct lpc54_i2cdev_s *priv,
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/* Yes.. instantiate the new I2C frequency */
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#warning Missing logic
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priv->frequency = frequency;
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priv->frequency = frequency;
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}
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}
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@@ -364,8 +390,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c0_dev;
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priv->base = LPC54_FLEXCOMM0_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM0;
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priv->inclck = BOARD_FLEXCOMM0_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM0;
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priv->fclock = BOARD_FLEXCOMM0_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -374,7 +400,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM0 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM0_CLKSEL, LPC54_SYSCON_FCLKSEL0);
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/* Set the default I2C frequency */
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@@ -400,8 +426,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c1_dev;
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priv->base = LPC54_FLEXCOMM1_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM1;
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priv->inclck = BOARD_FLEXCOMM1_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM1;
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priv->fclock = BOARD_FLEXCOMM1_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -410,7 +436,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM1 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM1_CLKSEL, LPC54_SYSCON_FCLKSEL1);
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/* Set the default I2C frequency */
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@@ -436,8 +462,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c2_dev;
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priv->base = LPC54_FLEXCOMM2_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM2;
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priv->inclck = BOARD_FLEXCOMM2_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM2;
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priv->fclock = BOARD_FLEXCOMM2_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -472,8 +498,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c3_dev;
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priv->base = LPC54_FLEXCOMM3_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM3;
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priv->inclck = BOARD_FLEXCOMM3_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM3;
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priv->fclock = BOARD_FLEXCOMM3_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -482,7 +508,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM3 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM3_CLKSEL, LPC54_SYSCON_FCLKSEL3);
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/* Set the default I2C frequency */
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@@ -508,8 +534,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c4_dev;
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priv->base = LPC54_FLEXCOMM4_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM4;
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priv->inclck = BOARD_FLEXCOMM4_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM4;
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priv->fclock = BOARD_FLEXCOMM4_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -518,7 +544,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM4 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM4_CLKSEL, LPC54_SYSCON_FCLKSEL4);
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/* Set the default I2C frequency */
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@@ -544,8 +570,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c5_dev;
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priv->base = LPC54_FLEXCOMM5_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM5;
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priv->inclck = BOARD_FLEXCOMM5_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM5;
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priv->fclock = BOARD_FLEXCOMM5_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -554,7 +580,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM5 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM5_CLKSEL, LPC54_SYSCON_FCLKSEL5);
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/* Set the default I2C frequency */
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@@ -580,8 +606,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c6_dev;
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priv->base = LPC54_FLEXCOMM6_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM6;
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priv->inclck = BOARD_FLEXCOMM6_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM6;
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priv->fclock = BOARD_FLEXCOMM6_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -590,7 +616,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM6 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM6_CLKSEL, LPC54_SYSCON_FCLKSEL6);
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/* Set the default I2C frequency */
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@@ -616,8 +642,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c7_dev;
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priv->base = LPC54_FLEXCOMM7_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM7;
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priv->inclck = BOARD_FLEXCOMM7_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM7;
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priv->fclock = BOARD_FLEXCOMM7_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -626,7 +652,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM7 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM7_CLKSEL, LPC54_SYSCON_FCLKSEL7);
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/* Set the default I2C frequency */
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@@ -652,8 +678,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c8_dev;
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priv->base = LPC54_FLEXCOMM8_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM8;
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priv->inclck = BOARD_FLEXCOMM8_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM8;
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priv->fclock = BOARD_FLEXCOMM8_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -662,7 +688,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM8 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM8_CLKSEL, LPC54_SYSCON_FCLKSEL8);
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/* Set the default I2C frequency */
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@@ -688,8 +714,8 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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priv = &g_i2c9_dev;
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priv->base = LPC54_FLEXCOMM9_BASE;
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priv->irqid = LPC54_IRQ_FLEXCOMM9;
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priv->inclck = BOARD_FLEXCOMM9_FCLK;
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priv->irq = LPC54_IRQ_FLEXCOMM9;
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priv->fclock = BOARD_FLEXCOMM9_FCLK;
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/* Configure I2C pins (defined in board.h) */
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@@ -698,7 +724,7 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Set up the FLEXCOMM9 function clock */
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putreg32(BOARD_FLEXCOMM2_CLKSEL, LPC54_SYSCON_FCLKSEL2);
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putreg32(BOARD_FLEXCOMM9_CLKSEL, LPC54_SYSCON_FCLKSEL9);
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/* Set the default I2C frequency */
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@@ -737,11 +763,11 @@ struct i2c_master_s *lpc54_i2cbus_initialize(int port)
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/* Attach Interrupt Handler */
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irq_attach(priv->irqid, lpc54_i2c_interrupt, priv);
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irq_attach(priv->irq, lpc54_i2c_interrupt, priv);
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/* Enable Interrupt Handler */
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up_enable_irq(priv->irqid);
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up_enable_irq(priv->irq);
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/* Install our operations */
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@@ -764,15 +790,13 @@ int lpc54_i2cbus_uninitialize(FAR struct i2c_master_s * dev)
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/* Disable I2C interrupts */
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#warning Missing logic
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/* Disable the I2C perifpheral */
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/* Disable the I2C peripheral */
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#warning Missing logic
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putreg32(0, base + LPC54_USART_CFG_OFFSET);
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#warning Missing logic
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/* Disable the Flexcomm interface at the NVIC and detach the interrupt. */
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/* Disables the Flexcomm interface at the NVIC and detach the interrupt. */
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up_disable_irq(priv->irqid);
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irq_detach(priv->irqid);
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up_disable_irq(priv->irq);
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irq_detach(priv->irq);
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return OK;
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}
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,180 @@
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/************************************************************************************
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* arch/arm/src/lpc54xx/lpc54_spi_master.h
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
|
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
|
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* the documentation and/or other materials provided with the
|
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
|
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* used to endorse or promote products derived from this software
|
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* without specific prior written permission.
|
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************************/
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#ifndef __ARCH_ARM_SRC_LPC54XX_SPI_MASTER_H
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#define __ARCH_ARM_SRC_LPC54XX_SPI_MASTER_H
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/************************************************************************************
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* Included Files
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************************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/spi/spi.h>
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#ifdef HAVE_SPI_MASTER_DEVICE
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/************************************************************************************
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* Pre-processor Definitions
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************************************************************************************/
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/* This header file defines interfaces to common SPI logic. To use this common SPI
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* logic on your board:
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*
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* 1. Provide logic in lpc54_boardinitialize() to configure SPI chip select pins.
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* 2. Provide the lpc54_spiselect() and lpc54_spistatus() functions in your
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* board-specific logic. These functions will perform chip selection
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* and status operations using GPIOs in the way your board is configured.
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* 3. If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, provide
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* lpc54_spicmddata() functions in your board-specific logic. This
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* function will perform cmd/data selection operations using GPIOs in the
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* way your board is configured.
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* 4. Your low level board initialization logic should call lpc54_spibus_initialize.
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* 5. The handle returned by lpc54_spibus_initialize() may then be used to bind the
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* SPI driver to higher level logic (e.g., calling mmcsd_spislotinitialize(),
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* for example, will bind the SPI driver to the SPI MMC/SD driver).
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*/
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/************************************************************************************
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* Public Types
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************************************************************************************/
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/************************************************************************************
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* Public Data
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************************************************************************************/
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#ifndef __ASSEMBLY__
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/************************************************************************************
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* Public Functions
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************************************************************************************/
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/****************************************************************************
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* Name: lpc54_spibus_initialize
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*
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* Description:
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* Initialize the selected SPI port
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* 0 - SPI0
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* 1 - SPI1
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* ...
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* 9 - SPI9
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*
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* Input Parameter:
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* port - SPI peripheral number, 0.. 9.
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*
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* Returned Value:
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* Valid SPI device structure reference on success; a NULL on failure
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*
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****************************************************************************/
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FAR struct spi_dev_s *lpc54_spibus_initialize(int port);
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/************************************************************************************
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* Name: lpc54_spiselect, lpc54_spistatus, and lpc54_spicmddata
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*
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* Description:
|
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* These functions must be provided in your board-specific logic. The
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* lpc54_spiselect function will perform chip selection and the lpc54_spistatus
|
||||
* will perform status operations using GPIOs in the way your board is configured.
|
||||
*
|
||||
* If CONFIG_SPI_CMDDATA is defined in the NuttX configuration, then
|
||||
* lpc54_spicmddata must also be provided. This functions performs cmd/data
|
||||
* selection operations using GPIOs in the way your board is configured.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
void lpc54_spiselect(FAR struct spi_dev_s *dev, uint32_t devid, bool selected);
|
||||
uint8_t lpc54_spistatus(FAR struct spi_dev_s *dev, uint32_t devid);
|
||||
|
||||
#ifdef CONFIG_SPI_CMDDATA
|
||||
int lpc54_spicmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd);
|
||||
#endif
|
||||
|
||||
/************************************************************************************
|
||||
* Name: spi_flush
|
||||
*
|
||||
* Description:
|
||||
* Flush and discard any words left in the RX fifo. This can be called from
|
||||
* spiselect after a device is deselected (if you worry about such things).
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
*
|
||||
* Returned Value:
|
||||
* None
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
void spi_flush(FAR struct spi_dev_s *dev);
|
||||
|
||||
/************************************************************************************
|
||||
* Name: lpc54_spi/spiregister
|
||||
*
|
||||
* Description:
|
||||
* If the board supports a card detect callback to inform the SPI-based MMC/SD
|
||||
* driver when an SD card is inserted or removed, then CONFIG_SPI_CALLBACK should
|
||||
* be defined and the following function(s) must must be implemented. These
|
||||
* functions implements the registercallback method of the SPI interface (see
|
||||
* include/nuttx/spi/spi.h for details)
|
||||
*
|
||||
* Input Parameters:
|
||||
* dev - Device-specific state data
|
||||
* callback - The function to call on the media change
|
||||
* arg - A caller provided value to return with the callback
|
||||
*
|
||||
* Returned Value:
|
||||
* 0 on success; negated errno on failure.
|
||||
*
|
||||
************************************************************************************/
|
||||
|
||||
#ifdef CONFIG_SPI_CALLBACK
|
||||
int lpc54_spiregister(FAR struct spi_dev_s *dev, spi_mediachange_t callback, void *arg);
|
||||
#endif
|
||||
|
||||
#undef EXTERN
|
||||
#if defined(__cplusplus)
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* __ASSEMBLY__ */
|
||||
#endif /* HAVE_SPI_MASTER_DEVICE */
|
||||
#endif /* __ARCH_ARM_SRC_LPC54XX_SPI_MASTER_H */
|
||||
Reference in New Issue
Block a user