drivers/: Make 'fallback_{un}map' the default unless defined

Drop the explicit need to specify the default 'fallback_{un}map'
callback function pointer from the 'programmer_entry' struct.
This is a reasonable default for every other driver in the tree
with only a select few exceptions [atavia, serprog, dummyflasher
and internal].

Thus this simplifies driver development and paves way
to remove the 'programmer' global handle.

Change-Id: I5ea7bd68f7ae2cd4af9902ef07255ab6ce0bfdb3
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/67404
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

atahpt.c

@@ -120,6 +120,4 @@ const struct programmer_entry programmer_atahpt = {
 	.type			= PCI,
 	.devs.dev		= ata_hpt,
 	.init			= atahpt_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

atapromise.c

@@ -184,6 +184,4 @@ const struct programmer_entry programmer_atapromise = {
 	.type			= PCI,
 	.devs.dev		= ata_promise,
 	.init			= atapromise_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

atavia.c

@@ -190,5 +190,4 @@ const struct programmer_entry programmer_atavia = {
 	.devs.dev		= ata_via,
 	.init			= atavia_init,
 	.map_flash_region	= atavia_map,
-	.unmap_flash_region	= fallback_unmap,
 };

buspirate_spi.c

@@ -714,6 +714,4 @@ const struct programmer_entry programmer_buspirate_spi = {
 				/* FIXME */
 	.devs.note		= "Dangerous Prototypes Bus Pirate\n",
 	.init			= buspirate_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

ch341a_spi.c

@@ -525,7 +525,5 @@ const struct programmer_entry programmer_ch341a_spi = {
 	.type			= USB,
 	.devs.dev		= devs_ch341a_spi,
 	.init			= ch341a_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 	.delay			= ch341a_spi_delay,
 };

dediprog.c

@@ -1319,6 +1319,4 @@ const struct programmer_entry programmer_dediprog = {
 	.type			= USB,
 	.devs.dev		= devs_dediprog,
 	.init			= dediprog_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

developerbox_spi.c

@@ -193,6 +193,4 @@ const struct programmer_entry programmer_developerbox = {
 	.type			= USB,
 	.devs.dev		= devs_developerbox_spi,
 	.init			= developerbox_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

digilent_spi.c

@@ -468,6 +468,4 @@ const struct programmer_entry programmer_digilent_spi = {
 	.type			= USB,
 	.devs.dev		= devs_digilent_spi,
 	.init			= digilent_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

drkaiser.c

@@ -122,6 +122,4 @@ const struct programmer_entry programmer_drkaiser = {
 	.type			= PCI,
 	.devs.dev		= drkaiser_pcidev,
 	.init			= drkaiser_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

flashrom.c

@@ -205,7 +205,11 @@ int programmer_shutdown(void)
 
 void *programmer_map_flash_region(const char *descr, uintptr_t phys_addr, size_t len)
 {
-	void *ret = programmer->map_flash_region(descr, phys_addr, len);
+	void *ret;
+	if (programmer->map_flash_region)
+		ret = programmer->map_flash_region(descr, phys_addr, len);
+	else
+		ret = fallback_map(descr, phys_addr, len);
 	msg_gspew("%s: mapping %s from 0x%0*" PRIxPTR " to 0x%0*" PRIxPTR "\n",
 		  __func__, descr, PRIxPTR_WIDTH, phys_addr, PRIxPTR_WIDTH, (uintptr_t) ret);
 	return ret;
@@ -213,7 +217,10 @@ void *programmer_map_flash_region(const char *descr, uintptr_t phys_addr, size_t
 
 void programmer_unmap_flash_region(void *virt_addr, size_t len)
 {
-	programmer->unmap_flash_region(virt_addr, len);
+	if (programmer->unmap_flash_region)
+		programmer->unmap_flash_region(virt_addr, len);
+	else
+		fallback_unmap(virt_addr, len);
 	msg_gspew("%s: unmapped 0x%0*" PRIxPTR "\n", __func__, PRIxPTR_WIDTH, (uintptr_t)virt_addr);
 }
 
@@ -1423,14 +1430,6 @@ int selfcheck(void)
 			msg_gerr("Programmer %s does not have a valid init function!\n", p->name);
 			ret = 1;
 		}
-		if (p->map_flash_region == NULL) {
-			msg_gerr("Programmer %s does not have a valid map_flash_region function!\n", p->name);
-			ret = 1;
-		}
-		if (p->unmap_flash_region == NULL) {
-			msg_gerr("Programmer %s does not have a valid unmap_flash_region function!\n", p->name);
-			ret = 1;
-		}
 	}
 
 	/* It would be favorable if we could check for the correct layout (especially termination) of various

ft2232_spi.c

@@ -711,6 +711,4 @@ const struct programmer_entry programmer_ft2232_spi = {
 	.type			= USB,
 	.devs.dev		= devs_ft2232spi,
 	.init			= ft2232_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

gfxnvidia.c

@@ -150,6 +150,4 @@ const struct programmer_entry programmer_gfxnvidia = {
 	.type			= PCI,
 	.devs.dev		= gfx_nvidia,
 	.init			= gfxnvidia_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

it8212.c

@@ -111,6 +111,4 @@ const struct programmer_entry programmer_it8212 = {
 	.type			= PCI,
 	.devs.dev		= devs_it8212,
 	.init			= it8212_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

jlink_spi.c

@@ -536,6 +536,4 @@ const struct programmer_entry programmer_jlink_spi = {
 	.type			= OTHER,
 	.init			= jlink_spi_init,
 	.devs.note		= "SEGGER J-Link and compatible devices\n",
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

linux_mtd.c

@@ -557,6 +557,4 @@ const struct programmer_entry programmer_linux_mtd = {
 	.type			= OTHER,
 	.devs.note		= "Device files /dev/mtd*\n",
 	.init			= linux_mtd_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

linux_spi.c

@@ -251,6 +251,4 @@ const struct programmer_entry programmer_linux_spi = {
 	.type			= OTHER,
 	.devs.note		= "Device files /dev/spidev*.*\n",
 	.init			= linux_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

mediatek_i2c_spi.c

@@ -542,6 +542,4 @@ const struct programmer_entry programmer_mediatek_i2c_spi = {
 	.type			= OTHER,
 	.devs.note		= "Device files /dev/i2c-*\n",
 	.init			= mediatek_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

mstarddc_spi.c

@@ -255,6 +255,4 @@ const struct programmer_entry programmer_mstarddc_spi = {
 	.type			= OTHER,
 	.devs.note		= "MSTAR DDC devices addressable via /dev/i2c-* on Linux.\n",
 	.init			= mstarddc_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

ni845x_spi.c

@@ -635,6 +635,4 @@ const struct programmer_entry programmer_ni845x_spi = {
 	.type			= OTHER, // choose other because NI-845x uses own USB implementation
 	.devs.note		= "National Instruments USB-845x\n",
 	.init			= ni845x_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

nic3com.c

@@ -168,6 +168,4 @@ const struct programmer_entry programmer_nic3com = {
 	.type			= PCI,
 	.devs.dev		= nics_3com,
 	.init			= nic3com_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

nicintel.c

@@ -133,6 +133,4 @@ const struct programmer_entry programmer_nicintel = {
 	.type			= PCI,
 	.devs.dev		= nics_intel,
 	.init			= nicintel_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

nicintel_eeprom.c

@@ -538,6 +538,4 @@ const struct programmer_entry programmer_nicintel_eeprom = {
 	.type			= PCI,
 	.devs.dev		= nics_intel_ee,
 	.init			= nicintel_ee_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

nicintel_spi.c

@@ -337,6 +337,4 @@ const struct programmer_entry programmer_nicintel_spi = {
 	.type			= PCI,
 	.devs.dev		= nics_intel_spi,
 	.init			= nicintel_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

nicnatsemi.c

@@ -127,6 +127,4 @@ const struct programmer_entry programmer_nicnatsemi = {
 	.type			= PCI,
 	.devs.dev		= nics_natsemi,
 	.init			= nicnatsemi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

nicrealtek.c

@@ -146,6 +146,4 @@ const struct programmer_entry programmer_nicrealtek = {
 	.type			= PCI,
 	.devs.dev		= nics_realtek,
 	.init			= nicrealtek_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

ogp_spi.c

@@ -178,6 +178,4 @@ const struct programmer_entry programmer_ogp_spi = {
 	.type			= PCI,
 	.devs.dev		= ogp_spi,
 	.init			= ogp_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

parade_lspcon.c

@@ -507,6 +507,4 @@ const struct programmer_entry programmer_parade_lspcon = {
 	.type			= OTHER,
 	.devs.note		= "Device files /dev/i2c-*.\n",
 	.init			= parade_lspcon_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

pickit2_spi.c

@@ -511,6 +511,4 @@ const struct programmer_entry programmer_pickit2_spi = {
 	.type			= USB,
 	.devs.dev		= devs_pickit2_spi,
 	.init			= pickit2_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

pony_spi.c

@@ -272,6 +272,4 @@ const struct programmer_entry programmer_pony_spi = {
 				/* FIXME */
 	.devs.note		= "Programmers compatible with SI-Prog, serbang or AJAWe\n",
 	.init			= pony_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

raiden_debug_spi.c

@@ -1649,6 +1649,4 @@ const struct programmer_entry programmer_raiden_debug_spi = {
 	.type			= USB,
 	.devs.dev		= devs_raiden,
 	.init			= raiden_debug_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

rayer_spi.c

@@ -329,6 +329,4 @@ const struct programmer_entry programmer_rayer_spi = {
 				/* FIXME */
 	.devs.note		= "RayeR parallel port programmer\n",
 	.init			= rayer_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

realtek_mst_i2c_spi.c

@@ -544,6 +544,4 @@ const struct programmer_entry programmer_realtek_mst_i2c_spi = {
 	.type			= OTHER,
 	.devs.note		= "Device files /dev/i2c-*.\n",
 	.init			= realtek_mst_i2c_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

satamv.c

@@ -211,6 +211,4 @@ const struct programmer_entry programmer_satamv = {
 	.type			= PCI,
 	.devs.dev		= satas_mv,
 	.init			= satamv_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

satasii.c

@@ -153,6 +153,4 @@ const struct programmer_entry programmer_satasii = {
 	.type			= PCI,
 	.devs.dev		= satas_sii,
 	.init			= satasii_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

serprog.c

@@ -967,6 +967,5 @@ const struct programmer_entry programmer_serprog = {
 	.devs.note		= "All programmer devices speaking the serprog protocol\n",
 	.init			= serprog_init,
 	.map_flash_region	= serprog_map,
-	.unmap_flash_region	= fallback_unmap,
 	.delay			= serprog_delay,
 };

stlinkv3_spi.c

@@ -556,6 +556,4 @@ const struct programmer_entry programmer_stlinkv3_spi = {
 	.type			= USB,
 	.devs.dev		= devs_stlinkv3_spi,
 	.init			= stlinkv3_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };

usbblaster_spi.c

@@ -232,6 +232,4 @@ const struct programmer_entry programmer_usbblaster_spi = {
 	.type			= USB,
 	.devs.dev		= devs_usbblasterspi,
 	.init			= usbblaster_spi_init,
-	.map_flash_region	= fallback_map,
-	.unmap_flash_region	= fallback_unmap,
 };