| sfking@fdwdc.com | af39bb8 | 2009-06-19 18:11:00 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Coldfire generic GPIO support. |
| 3 | * |
| 4 | * (C) Copyright 2009, Steven King <sfking@fdwdc.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | */ |
| 15 | |
| 16 | #ifndef mcfgpio_h |
| 17 | #define mcfgpio_h |
| 18 | |
| 19 | #include <linux/io.h> |
| 20 | #include <asm-generic/gpio.h> |
| 21 | |
| 22 | struct mcf_gpio_chip { |
| 23 | struct gpio_chip gpio_chip; |
| 24 | void __iomem *pddr; |
| 25 | void __iomem *podr; |
| 26 | void __iomem *ppdr; |
| 27 | void __iomem *setr; |
| 28 | void __iomem *clrr; |
| 29 | const u8 *gpio_to_pinmux; |
| 30 | }; |
| 31 | |
| 32 | int mcf_gpio_direction_input(struct gpio_chip *, unsigned); |
| 33 | int mcf_gpio_get_value(struct gpio_chip *, unsigned); |
| 34 | int mcf_gpio_direction_output(struct gpio_chip *, unsigned, int); |
| 35 | void mcf_gpio_set_value(struct gpio_chip *, unsigned, int); |
| 36 | void mcf_gpio_set_value_fast(struct gpio_chip *, unsigned, int); |
| 37 | int mcf_gpio_request(struct gpio_chip *, unsigned); |
| 38 | void mcf_gpio_free(struct gpio_chip *, unsigned); |
| 39 | |
| Greg Ungerer | c269d4e | 2012-04-16 15:59:29 +1000 | [diff] [blame^] | 40 | /* |
| 41 | * Define macros to ease the pain of setting up the GPIO tables. There |
| 42 | * are two cases we need to deal with here, they cover all currently |
| 43 | * available ColdFire GPIO hardware. There are of course minor differences |
| 44 | * in the layout and number of bits in each ColdFire part, but the macros |
| 45 | * take all that in. |
| 46 | * |
| 47 | * Firstly is the conventional GPIO registers where we toggle individual |
| 48 | * bits in a register, preserving the other bits in the register. For |
| 49 | * lack of a better term I have called this the slow method. |
| 50 | */ |
| 51 | #define MCFGPS(mlabel, mbase, mngpio, mpddr, mpodr, mppdr) \ |
| 52 | { \ |
| 53 | .gpio_chip = { \ |
| 54 | .label = #mlabel, \ |
| 55 | .request = mcf_gpio_request, \ |
| 56 | .free = mcf_gpio_free, \ |
| 57 | .direction_input = mcf_gpio_direction_input, \ |
| 58 | .direction_output = mcf_gpio_direction_output,\ |
| 59 | .get = mcf_gpio_get_value, \ |
| 60 | .set = mcf_gpio_set_value, \ |
| 61 | .base = mbase, \ |
| 62 | .ngpio = mngpio, \ |
| 63 | }, \ |
| 64 | .pddr = (void __iomem *) mpddr, \ |
| 65 | .podr = (void __iomem *) mpodr, \ |
| 66 | .ppdr = (void __iomem *) mppdr, \ |
| 67 | } |
| 68 | |
| 69 | /* |
| 70 | * Secondly is the faster case, where we have set and clear registers |
| 71 | * that allow us to set or clear a bit with a single write, not having |
| 72 | * to worry about preserving other bits. |
| 73 | */ |
| 74 | #define MCFGPF(mlabel, mbase, mngpio) \ |
| 75 | { \ |
| 76 | .gpio_chip = { \ |
| 77 | .label = #mlabel, \ |
| 78 | .request = mcf_gpio_request, \ |
| 79 | .free = mcf_gpio_free, \ |
| 80 | .direction_input = mcf_gpio_direction_input, \ |
| 81 | .direction_output = mcf_gpio_direction_output,\ |
| 82 | .get = mcf_gpio_get_value, \ |
| 83 | .set = mcf_gpio_set_value_fast, \ |
| 84 | .base = mbase, \ |
| 85 | .ngpio = mngpio, \ |
| 86 | }, \ |
| 87 | .pddr = (void __iomem *) MCFGPIO_PDDR_##mlabel, \ |
| 88 | .podr = (void __iomem *) MCFGPIO_PODR_##mlabel, \ |
| 89 | .ppdr = (void __iomem *) MCFGPIO_PPDSDR_##mlabel, \ |
| 90 | .setr = (void __iomem *) MCFGPIO_PPDSDR_##mlabel, \ |
| 91 | .clrr = (void __iomem *) MCFGPIO_PCLRR_##mlabel, \ |
| 92 | } |
| 93 | |
| sfking@fdwdc.com | af39bb8 | 2009-06-19 18:11:00 -0700 | [diff] [blame] | 94 | #endif |