From: Jesper Nilsson <jesper.nilsson@axis.com>
Date: Fri, 25 Jan 2008 12:50:27 +0000 (+0100)
Subject: CRIS: Add support for ETRAX FS and ARTPEC-3 to etraxgpio.h
X-Git-Tag: v2.6.25-rc1~40^2~59
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=46aac058fe525a2a659e3363fa9bcd7d6bbf2d73;p=linux-2.6

CRIS: Add support for ETRAX FS and ARTPEC-3 to etraxgpio.h

The CRIS v32 architectures have more gpio ports and built in PWM.
---

diff --git a/include/asm-cris/etraxgpio.h b/include/asm-cris/etraxgpio.h
index 5d0028dba7..9fdb206f31 100644
--- a/include/asm-cris/etraxgpio.h
+++ b/include/asm-cris/etraxgpio.h
@@ -1,25 +1,34 @@
-/* $Id: etraxgpio.h,v 1.8 2002/06/17 15:53:07 johana Exp $ */
 /*
  * The following devices are accessable using this driver using
- * GPIO_MAJOR (120) and a couple of minor numbers:
- * For ETRAX 100LX (ARCH_V10):
+ * GPIO_MAJOR (120) and a couple of minor numbers.
+ *
+ * For ETRAX 100LX (CONFIG_ETRAX_ARCH_V10):
  * /dev/gpioa  minor 0, 8 bit GPIO, each bit can change direction
  * /dev/gpiob  minor 1, 8 bit GPIO, each bit can change direction
  * /dev/leds   minor 2, Access to leds depending on kernelconfig
  * /dev/gpiog  minor 3
-         g0dir, g8_15dir, g16_23dir, g24 dir configurable in R_GEN_CONFIG
-         g1-g7 and g25-g31 is both input and outputs but on different pins
-         Also note that some bits change pins depending on what interfaces 
-         are enabled.
+ *       g0dir, g8_15dir, g16_23dir, g24 dir configurable in R_GEN_CONFIG
+ *       g1-g7 and g25-g31 is both input and outputs but on different pins
+ *       Also note that some bits change pins depending on what interfaces
+ *       are enabled.
  *
+ * For ETRAX FS (CONFIG_ETRAXFS):
+ * /dev/gpioa  minor 0,  8 bit GPIO, each bit can change direction
+ * /dev/gpiob  minor 1, 18 bit GPIO, each bit can change direction
+ * /dev/gpioc  minor 3, 18 bit GPIO, each bit can change direction
+ * /dev/gpiod  minor 4, 18 bit GPIO, each bit can change direction
+ * /dev/gpioe  minor 5, 18 bit GPIO, each bit can change direction
+ * /dev/leds   minor 2, Access to leds depending on kernelconfig
  *
- * For ETRAX FS (ARCH_V32):
+ * For ARTPEC-3 (CONFIG_CRIS_MACH_ARTPEC3):
  * /dev/gpioa  minor 0,  8 bit GPIO, each bit can change direction
  * /dev/gpiob  minor 1, 18 bit GPIO, each bit can change direction
- * /dev/gpioc  minor 2, 18 bit GPIO, each bit can change direction
- * /dev/gpiod  minor 3, 18 bit GPIO, each bit can change direction
- * /dev/gpioe  minor 4, 18 bit GPIO, each bit can change direction
- * /dev/leds   minor 5, Access to leds depending on kernelconfig
+ * /dev/gpioc  minor 3, 18 bit GPIO, each bit can change direction
+ * /dev/gpiod  minor 4, 18 bit GPIO, each bit can change direction
+ * /dev/leds   minor 2, Access to leds depending on kernelconfig
+ * /dev/pwm0   minor 16, PWM channel 0 on PA30
+ * /dev/pwm1   minor 17, PWM channel 1 on PA31
+ * /dev/pwm2   minor 18, PWM channel 2 on PB26
  *
  */
 #ifndef _ASM_ETRAXGPIO_H
@@ -34,7 +43,8 @@
 #define GPIO_MINOR_G 3
 #define GPIO_MINOR_LAST 3
 #endif
-#ifdef CONFIG_ETRAX_ARCH_V32
+
+#ifdef CONFIG_ETRAXFS
 #define ETRAXGPIO_IOCTYPE 43
 #define GPIO_MINOR_A 0
 #define GPIO_MINOR_B 1
@@ -42,8 +52,32 @@
 #define GPIO_MINOR_C 3
 #define GPIO_MINOR_D 4
 #define GPIO_MINOR_E 5
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+#define GPIO_MINOR_V 6
+#define GPIO_MINOR_LAST 6
+#else
 #define GPIO_MINOR_LAST 5
 #endif
+#endif
+
+#ifdef CONFIG_CRIS_MACH_ARTPEC3
+#define ETRAXGPIO_IOCTYPE 43
+#define GPIO_MINOR_A 0
+#define GPIO_MINOR_B 1
+#define GPIO_MINOR_LEDS 2
+#define GPIO_MINOR_C 3
+#define GPIO_MINOR_D 4
+#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+#define GPIO_MINOR_V 6
+#define GPIO_MINOR_LAST 6
+#else
+#define GPIO_MINOR_LAST 4
+#endif
+#define GPIO_MINOR_PWM0 16
+#define GPIO_MINOR_PWM1 17
+#define GPIO_MINOR_PWM2 18
+#define GPIO_MINOR_LAST_PWM GPIO_MINOR_PWM2
+#endif
 
 /* supported ioctl _IOC_NR's */
 
@@ -63,7 +97,7 @@
 
 /* GPIO direction ioctl's */
 #define IO_READDIR    0x8  /* Read direction 0=input 1=output  (obsolete) */
-#define IO_SETINPUT   0x9  /* Set direction for bits set, 0=unchanged 1=input, 
+#define IO_SETINPUT   0x9  /* Set direction for bits set, 0=unchanged 1=input,
                               returns mask with current inputs (obsolete) */
 #define IO_SETOUTPUT  0xA  /* Set direction for bits set, 0=unchanged 1=output,
                               returns mask with current outputs (obsolete)*/
@@ -77,13 +111,13 @@
 #define IO_GET_PWR_BT 0xE
 
 /* Bit toggling in driver settings */
-/* bit set in low byte0 is CLK mask (0x00FF), 
-   bit set in byte1 is DATA mask    (0xFF00) 
+/* bit set in low byte0 is CLK mask (0x00FF),
+   bit set in byte1 is DATA mask    (0xFF00)
    msb, data_mask[7:0] , clk_mask[7:0]
  */
-#define IO_CFG_WRITE_MODE 0xF 
+#define IO_CFG_WRITE_MODE 0xF
 #define IO_CFG_WRITE_MODE_VALUE(msb, data_mask, clk_mask) \
-  ( (((msb)&1) << 16) | (((data_mask) &0xFF) << 8) | ((clk_mask) & 0xFF) )
+	( (((msb)&1) << 16) | (((data_mask) &0xFF) << 8) | ((clk_mask) & 0xFF) )
 
 /* The following 4 ioctl's take a pointer as argument and handles
  * 32 bit ports (port G) properly.
@@ -98,6 +132,48 @@
                                * *arg updated with current output pins.
                                */
 
+/* The following ioctl's are applicable to the PWM channels only */
+
+#define IO_PWM_SET_MODE     0x20
+
+enum io_pwm_mode {
+	PWM_OFF = 0,		/* disabled, deallocated */
+	PWM_STANDARD = 1,	/* 390 kHz, duty cycle 0..255/256 */
+	PWM_FAST = 2,		/* variable freq, w/ 10ns active pulse len */
+	PWM_VARFREQ = 3		/* individually configurable high/low periods */
+};
+
+struct io_pwm_set_mode {
+	enum io_pwm_mode mode;
+};
+
+/* Only for mode PWM_VARFREQ. Period lo/high set in increments of 10ns
+ * from 10ns (value = 0) to 81920ns (value = 8191)
+ * (Resulting frequencies range from 50 MHz (10ns + 10ns) down to
+ * 6.1 kHz (81920ns + 81920ns) at 50% duty cycle, to 12.2 kHz at min/max duty
+ * cycle (81920 + 10ns or 10ns + 81920ns, respectively).)
+ */
+#define IO_PWM_SET_PERIOD   0x21
+
+struct io_pwm_set_period {
+	int lo;		/* 0..8191 */
+	int hi;		/* 0..8191 */
+};
+
+/* Only for modes PWM_STANDARD and PWM_FAST.
+ * For PWM_STANDARD, set duty cycle of 390 kHz PWM output signal, from
+ * 0 (value = 0) to 255/256 (value = 255).
+ * For PWM_FAST, set duty cycle of PWM output signal from
+ * 0% (value = 0) to 100% (value = 255). Output signal in this mode
+ * is a 10ns pulse surrounded by a high or low level depending on duty
+ * cycle (except for 0% and 100% which result in a constant output).
+ * Resulting output frequency varies from 50 MHz at 50% duty cycle,
+ * down to 390 kHz at min/max duty cycle.
+ */
+#define IO_PWM_SET_DUTY     0x22
 
+struct io_pwm_set_duty {
+	int duty;		/* 0..255 */
+};
 
 #endif