len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2025-11-09 13:12:37 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

imx233: introduce virtual pins to simplify pin setup

Browse source 
A number of pins on the imx233 are standard and manually calling
functions to acquire, set function/drive/output is painful. This
will become unmanageable when we will add support for the other
stmp chips.
Introduce the concept of virtual pin which is a way to completely
describe a virtual pin (virtual because pins are muxed).

Change-Id: I01b6e040945648e58e1d1abab06529c9571c5f10
This commit is contained in:
Amaury Pouly 2013-06-16 19:43:32 +02:00
parent 8f351d6e21
commit 84fc327aeb
6 changed files with 156 additions and 52 deletions
Download patch file Download diff file Expand all files Collapse all files

81
firmware/target/arm/imx233/ssp-imx233.c
View file

@ -167,39 +167,33 @@ void imx233_ssp_set_timings(int ssp, int divide, int rate, int timeout)
void imx233_ssp_setup_ssp1_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
unsigned drive_strength, bool use_alt)
{
(void) use_alt;
/* SSP_{CMD,SCK} */
imx233_pinctrl_set_drive(2, 0, drive_strength);
imx233_pinctrl_set_drive(2, 6, drive_strength);
imx233_pinctrl_acquire(2, 0, "ssp1 cmd");
imx233_pinctrl_acquire(2, 6, "ssp1 sck");
imx233_pinctrl_set_function(2, 0, PINCTRL_FUNCTION_MAIN);
imx233_pinctrl_set_function(2, 6, PINCTRL_FUNCTION_MAIN);
imx233_pinctrl_enable_pullup(2, 0, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_CMD, "ssp1_cmd", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_SCK, "ssp1_sck", drive_strength, false);
/* SSP_DATA{0-3} */
for(unsigned i = 0; i < MIN(bus_width, 4); i++)
imx233_pinctrl_setup_vpin(VPIN_SSP1_D0, "ssp1_d0", drive_strength, enable_pullups);
if(bus_width >= 4)
{
imx233_pinctrl_acquire(2, 2 + i, "ssp1 data");
imx233_pinctrl_set_drive(2, 2 + i, drive_strength);
imx233_pinctrl_set_function(2, 2 + i, PINCTRL_FUNCTION_MAIN);
imx233_pinctrl_enable_pullup(2, 2 + i, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D1, "ssp1_d1", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D2, "ssp1_d2", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D3, "ssp1_d3", drive_strength, enable_pullups);
}
/* SSP_DATA{4-7} */
for(unsigned i = 4; i < bus_width; i++)
if(bus_width >= 8)
{
if(use_alt)
{
imx233_pinctrl_acquire(0, 22 + i, "ssp1 data");
imx233_pinctrl_set_drive(0, 22 + i, drive_strength);
imx233_pinctrl_set_function(0, 22 + i, PINCTRL_FUNCTION_ALT2);
imx233_pinctrl_enable_pullup(0, 22 + i, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D4_ALT, "ssp1_d4", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D5_ALT, "ssp1_d5", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D6_ALT, "ssp1_d6", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D7_ALT, "ssp1_d7", drive_strength, enable_pullups);
}
else
{
imx233_pinctrl_acquire(0, 4 + i, "ssp1 data");
imx233_pinctrl_set_drive(0, 4 + i, drive_strength);
imx233_pinctrl_set_function(0, 4 + i, PINCTRL_FUNCTION_ALT2);
imx233_pinctrl_enable_pullup(0, 4 + i, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D4, "ssp1_d4", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D5, "ssp1_d5", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D6, "ssp1_d6", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP1_D7, "ssp1_d7", drive_strength, enable_pullups);
}
}
}
@ -207,23 +201,26 @@ void imx233_ssp_setup_ssp1_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
void imx233_ssp_setup_ssp2_sd_mmc_pins(bool enable_pullups, unsigned bus_width,
unsigned drive_strength)
{
(void) enable_pullups;
(void) bus_width;
(void) drive_strength;
/* SSP_{CMD,SCK} */
imx233_pinctrl_acquire(0, 20, "ssp2 cmd");
imx233_pinctrl_acquire(0, 24, "ssp2 sck");
imx233_pinctrl_set_drive(0, 20, drive_strength);
imx233_pinctrl_set_drive(0, 24, drive_strength);
imx233_pinctrl_set_function(0, 20, PINCTRL_FUNCTION_ALT2);
imx233_pinctrl_set_function(0, 24, PINCTRL_FUNCTION_ALT2);
imx233_pinctrl_enable_pullup(0, 20, enable_pullups);
/* SSP_DATA{0-7}*/
for(unsigned i = 0; i < bus_width; i++)
imx233_pinctrl_setup_vpin(VPIN_SSP2_CMD, "ssp2_cmd", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP2_SCK, "ssp2_sck", drive_strength, false);
/* SSP_DATA{0-3} */
imx233_pinctrl_setup_vpin(VPIN_SSP2_D0, "ssp2_d0", drive_strength, enable_pullups);
if(bus_width >= 4)
{
imx233_pinctrl_acquire(0, i, "ssp2 data");
imx233_pinctrl_set_drive(0, i, drive_strength);
imx233_pinctrl_set_function(0, i, PINCTRL_FUNCTION_ALT2);
imx233_pinctrl_enable_pullup(0, i, enable_pullups);
imx233_pinctrl_enable_gpio(0, i, false);
imx233_pinctrl_set_gpio(0, i, false);
imx233_pinctrl_setup_vpin(VPIN_SSP2_D1, "ssp2_d1", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP2_D2, "ssp2_d2", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP2_D3, "ssp2_d3", drive_strength, enable_pullups);
}
if(bus_width >= 8)
{
imx233_pinctrl_setup_vpin(VPIN_SSP2_D4, "ssp2_d4", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP2_D5, "ssp2_d5", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP2_D6, "ssp2_d6", drive_strength, enable_pullups);
imx233_pinctrl_setup_vpin(VPIN_SSP2_D7, "ssp2_d7", drive_strength, enable_pullups);
}
}
@ -358,13 +355,15 @@ void imx233_ssp_sdmmc_setup_detect(int ssp, bool enable, ssp_detect_cb_t fn,
bool first_time, bool invert)
{
ASSERT_SSP(ssp)
int bank = ssp == 1 ? 2 : 0;
int pin = ssp == 1 ? 1 : 19;
vpin_t vpin = VPIN_SSP1_DET;
if(ssp == 2)
vpin = VPIN_SSP2_DET;
unsigned bank = VPIN_UNPACK_BANK(vpin), pin = VPIN_UNPACK_PIN(vpin);
ssp_detect_cb[ssp - 1] = fn;
ssp_detect_invert[ssp - 1] = invert;
if(enable)
{
imx233_pinctrl_acquire(bank, pin, ssp == 1 ? "ssp1 detect" : "ssp2 detect");
imx233_pinctrl_acquire(bank, pin, ssp == 1 ? "ssp1_det" : "ssp2_det");
imx233_pinctrl_set_function(bank, pin, PINCTRL_FUNCTION_GPIO);
imx233_pinctrl_enable_gpio(bank, pin, false);
}